Topic leaderboard
Ammonia, cyanogen & compounds
Ranked by the PatentIndex Score — a 1–99 percentile within C01C · public-visibility date · generated 2026
top 25 per window · public-visibility date
Rising· last 2 yrs
Inventors whose newest C01C patents became public in the last 2 years — the current frontier
- 199Hideo Hosono22 patents · 200 citations
- 296Masaaki Kitano21 patents · 176 citations
- 392Toshiharu Yokoyama21 patents · 176 citations
- 488Ethan J. Novek9 patents · 23 citations
- 583Jiang Li4 patents · 50 citations
- 679Mark D. Ibsen4 patents · 36 citations
- 775Praveen Jain4 patents · 36 citations
- 871Santiago Gomez4 patents · 36 citations
- 967Anna Louise Buckley5 patents · 10 citations
- 1063Bengt Arne Jarlsjo5 patents · 10 citations
- 1158Christopher Michael Miller5 patents · 10 citations
- 1254Daniel J. Shapiro5 patents · 10 citations
- 1350Boris Sheludko4 patents · 18 citations
- 1446Young Suk Jo4 patents · 18 citations
- 1542Byron Gladus Best, Iii4 patents · 10 citations
- 1638Junyoung Cha3 patents · 18 citations
- 1733Joey Dobree9 patents · 9 citations
- 1829Daniel Friebel7 patents · 5 citations
- 1925John Edwin Plumlee4 patents · 8 citations
- 2021Kazuhisa Kishida5 patents · 23 citations
- 2117Evgeni Gorval3 patents · 22 citations
- 2213Shigeki Kawamura3 patents · 23 citations
- 238Martin Taylor7 patents · 2 citations
- 244Vincent White2 patents · 5 citations
- 251Derek Haas2 patents · 2 citations
Active· last 5 yrs
Sustained C01C output across the last 5 years
- 199Hideo Hosono22 patents · 200 citations
- 296Masaaki Kitano21 patents · 176 citations
- 392Toshiharu Yokoyama21 patents · 176 citations
- 488Michael L. Mengel7 patents · 173 citations
- 583Ermanno Filippi28 patents · 128 citations
- 679Stephen A. Noe7 patents · 109 citations
- 775Adam W. Welch7 patents · 64 citations
- 871Joseph D. Beach7 patents · 64 citations
- 967Colin Deane Wessells11 patents · 30 citations
- 1063Jing Luo12 patents · 33 citations
- 1158Christian Henrik Speth9 patents · 40 citations
- 1254Raffaele Ostuni18 patents · 39 citations
- 1350Pat A. Han13 patents · 36 citations
- 1446Michael T. Hammer5 patents · 54 citations
- 1542Yongying Luo6 patents · 25 citations
- 1638Ethan J. Novek9 patents · 23 citations
- 1733Robert Hoch3 patents · 219 citations
- 1829Yasunori Inoue5 patents · 70 citations
- 1925John David Pach9 patents · 20 citations
- 2021Jiang Li4 patents · 50 citations
- 2117Mark D. Ibsen4 patents · 36 citations
- 2213Praveen Jain4 patents · 36 citations
- 238Santiago Gomez4 patents · 36 citations
- 244Mark M. Simon6 patents · 16 citations
- 251Morton Orentlicher6 patents · 16 citations
All-time canon
Career PatentIndex Score in C01C
- 199David J. Edlund6 patents · 1,252 citations
- 296Terry Mazanec13 patents · 886 citations
- 392Thomas L. Cable13 patents · 886 citations
- 488John G. Frye, Jr.8 patents · 694 citations
- 583Wayne R. Kliewer8 patents · 694 citations
- 679Anthony F. Sammells8 patents · 419 citations
- 775Herbert W. Spencer, Iii6 patents · 212 citations
- 871Hal B. H. Cooper5 patents · 209 citations
- 967Michael Schwartz6 patents · 312 citations
- 1063Umberto Zardi22 patents · 427 citations
- 1158Richard Mackay5 patents · 253 citations
- 1254Alwyn Pinto11 patents · 316 citations
- 1350Joe G. Hoffman11 patents · 281 citations
- 1446R. Scot Clark9 patents · 249 citations
- 1542Donald L. Maclean7 patents · 271 citations
- 1638Vincenzo Lagana5 patents · 207 citations
- 1733Paul J. Berlowitz21 patents · 83 citations
- 1829Timothy Andrew Barckholtz21 patents · 83 citations
- 1925Yutaka Sasaki14 patents · 282 citations
- 2021Ramachandran Krishnamurthy6 patents · 192 citations
- 2117Lukas Von Hippel10 patents · 210 citations
- 2213Christiaan P. Van Dijk5 patents · 195 citations
- 238Michael B. Mezner8 patents · 179 citations
- 244Robert J. Barnett8 patents · 179 citations
- 251Hideo Hosono22 patents · 200 citations
Rising· last 2 yrs
The top-scoring C01C patents made public in the last 2 years
- 199US11952274B1✦ AIProcess for producing hydrogen product having reduced carbon intensity4 cites · 202470% earned
- 296US12409434B1✦ AISystems and methods for sequential energization of heating elements in an electric catalys1 cites · 202556% earned
- 392US11918967B1✦ AISystem and method for magma-driven thermochemical processes3 cites · 202472% earned
- 488US12017913B1Process for using waste heat and carbon dioxide from the production of low, neutral and/or2 cites · 202476% earned
- 583US12140000B1Nuclear reactor integrated oil and gas production systems and methods of operation1 cites · 202446% earned
- 679US12097482B2Systems and methods for processing ammonia1 cites · 202450% earned
- 775US11912581B1Low vacancy Fe-substituted Mn-based Prussian blue analogue1 cites · 202456% earned
- 871US11965258B1Sulfur dioxide depolarized electrolysis and electrolyzer therefore1 cites · 202456% earned
- 967US12151946B2Positive electrode active material, sodium-ion secondary battery comprising the same and e1 cites · 202467% earned
- 1063US11999626B1Leaching method of scheelite1 cites · 202467% earned
- 1158US12421109B2Process and apparatus for cracking ammonia1 cites · 202467% earned
- 1254USRE50128ESystem and method for production of granular ammonium sulfate0 cites · 20240% earned
- 1350US12458953B2Method for manufacturing ammonia synthesis catalyst, and method for manufacturing ammonia0 cites · 20240% earned
- 1446US12416086B2Alkali hydroxide production from alkali sulfate with halogen or carboxylic acid intermedia0 cites · 20250% earned
- 1542US12312248B2Systems and methods for ammonia purification0 cites · 20250% earned
- 1638US12577121B2Metal-supported material and ammonia synthesis catalyst0 cites · 20240% earned
- 1733US12552982B2Treatment of subterranean formations0 cites · 20240% earned
- 1829US12162772B2System for offshore production of fuel0 cites · 20240% earned
- 1925US12215037B2Systems and methods for recovering salts, aluminum, alumina and ammonia from salt slag was0 cites · 20240% earned
- 2021US12358846B2Reciprocating freeze concentration for urine-based fertilizer production0 cites · 20240% earned
- 2117US12269751B2Ammonia plant having a start-up furnace and method for producing ammonia0 cites · 20240% earned
- 2213US12534375B2Ammonia synthesis system and ammonia production method0 cites · 20250% earned
- 238US12113215B2Preparation method for Prussian blue sodium-ion battery positive electrode material0 cites · 20240% earned
- 244US12515959B1Method for size-controlled synthesis of transition metal cyanide coordination compound0 cites · 20260% earned
- 251US12497290B2Process and apparatus for cracking ammonia0 cites · 20240% earned
Active· last 5 yrs
The top-scoring C01C patents of the last 5 years
- 199US11795055B1✦ AISystems and methods for processing ammonia9 cites · 202387% earned
- 296US11697108B2✦ AISystems and methods for processing ammonia8 cites · 202276% earned
- 392US11377363B2✦ AIMethods and systems for forming vaterite from calcined limestone using electric kiln9 cites · 202181% earned
- 488US11168045B2Process for methanol production12 cites · 202188% earned
- 583US11679977B2Integration of power generation with methane reforming8 cites · 202380% earned
- 679US11014810B1Carbon capture, waste upgrade, and chemicals production using improved flexicoking9 cites · 202187% earned
- 775US11236033B2Processes for the production of citric acid7 cites · 202186% earned
- 871US11952274B1Process for producing hydrogen product having reduced carbon intensity4 cites · 202470% earned
- 967US11626730B2Method and apparatus for managing predicted power resources for an industrial gas plant co5 cites · 202277% earned
- 1063US12409434B1Systems and methods for sequential energization of heating elements in an electric catalys1 cites · 202556% earned
- 1158US11702988B2Ammonia decomposition facility, gas turbine plant equipped with same, and ammonia decompos6 cites · 202285% earned
- 1254US11174169B2Process for the production of metal oxides5 cites · 202184% earned
- 1350US11656612B2Method and apparatus for managing industrial gas production5 cites · 202384% earned
- 1446US11753583B2Treatment of subterranean formations5 cites · 202284% earned
- 1542US11453950B1Method and apparatus for dosing hydrogen in a centrifugal compression system4 cites · 202282% earned
- 1638US11453951B1Method for ammonia recovery from contaminated water including solvay effluent and aqueous 4 cites · 202282% earned
- 1733US11918967B1System and method for magma-driven thermochemical processes3 cites · 202472% earned
- 1829US12017913B1Process for using waste heat and carbon dioxide from the production of low, neutral and/or2 cites · 202476% earned
- 1925US11739256B2Treatment of subterranean formations4 cites · 202282% earned
- 2021US11695163B1Hierachical structure of transition metal cyanide coordination compounds2 cites · 202358% earned
- 2117US12098079B2Chemical reactor with integrated heat exchanger, heater, and high conductance catalyst hol2 cites · 202261% earned
- 2213US11603599B2Systems and methods of ammonia synthesis3 cites · 202172% earned
- 238US11254639B1Cyclic process for producing taurine from monoethanolamine3 cites · 202272% earned
- 244US11224838B2Controlling aerosol production during absorption in ammonia-based desulfurization3 cites · 202180% earned
- 251US11649201B2Autonomous modular flare gas conversion systems and methods2 cites · 202276% earned
All-time canon
The defining C01C patents of the whole record
- 199US6685754B2✦ AIMethod for the production of hydrogen-containing gaseous mixtures474 cites · 200390% earned
- 296US6232352B1✦ AIMethanol plant retrofit for acetic acid manufacture433 cites · 200195% earned
- 392US10340135B2✦ AIMethod of topologically restricted plasma-enhanced cyclic deposition of silicon or metal n426 cites · 201895% earned
- 488US7514058B1Apparatus for on-site production of nitrate ions410 cites · 200992% earned
- 583US5306411ASolid multi-component membranes, electrochemical reactor components, electrochemical react326 cites · 199494% earned
- 679US5498278AComposite hydrogen separation element and module309 cites · 199694% earned
- 775US5645626AComposite hydrogen separation element and module253 cites · 199794% earned
- 871US6248794B1Integrated process for converting hydrocarbon gas to liquids214 cites · 200194% earned
- 967US5393325AComposite hydrogen separation metal membrane208 cites · 199594% earned
- 1063US6531704B2Nanotechnology for engineering the performance of substances201 cites · 200194% earned
- 1158US7135100B1Amperometric sensor194 cites · 200691% earned
- 1254US5217506AHydrogen-permeable composite metal membrane and uses thereof179 cites · 199394% earned
- 1350US6214195B1Method and device for transforming chemical compositions171 cites · 200194% earned
- 1446US5569635ACatalyst supports, supported catalysts and methods of making and using the same167 cites · 199694% earned
- 1542US6221225B1Apparatus and process for electrodialysis of salts164 cites · 200188% earned
- 1638US5259870AHydrogen-permeable composite metal membrane153 cites · 199394% earned
- 1733US7674443B1Zero emission gasification, power generation, carbon oxides management and metallurgical r151 cites · 201094% earned
- 1829US5139541AHydrogen-permeable composite metal membrane150 cites · 199294% earned
- 1925US6267864B1Field assisted transformation of chemical and material compositions138 cites · 200193% earned
- 2021US5441716AMethod and apparatus for achieving high reaction rates127 cites · 199593% earned
- 2117US6355093B1Two component-three dimensional catalysis126 cites · 200293% earned
- 2213US5837158APolymer formulations for gettering hydrogen122 cites · 199893% earned
- 238US5965264APowders providing controlled sustained release of a gas119 cites · 199993% earned
- 244US5744015ASolid multi-component membranes, electrochemical reactor components, electrochemical react117 cites · 199886% earned
- 251US6146549ACeramic membranes for catalytic membrane reactors with high ionic conductivities and low e116 cites · 200093% earned
Rising· last 2 yrs
Assignees whose newest C01C patents became public in the last 2 years — the current frontier
- 199AIR PROD & CHEM27 patents · 437 citations
- 296JAPAN SCIENCE & TECH AGENCY16 patents · 147 citations
- 392AIR LIQUIDE14 patents · 156 citations
- 488STAMICARBON25 patents · 123 citations
- 583BATTELLE MEMORIAL INSTITUTE6 patents · 81 citations
- 679NATRON ENERGY INC12 patents · 9 citations
- 775INNOSPEC LTD5 patents · 13 citations
- 871KRAKEN TECH HOLDINGS LLC5 patents · 10 citations
- 967AMOGY INC4 patents · 18 citations
- 1063TOKYO INST TECH5 patents · 24 citations
- 1158INNOVATOR ENERGY LLC4 patents · 13 citations
- 1254PCI NITROGEN LLC3 patents · 4 citations
- 1350Natura Resources LLC2 patents · 2 citations
- 1446THYSSENKRUPP UHDE GMBH3 patents · 2 citations
- 1542ENHANCEDGEO LLC1 patents · 3 citations
- 1638FIRST AMMONIA MOTORS INC2 patents · 1 citations
- 1733DOOSAN ENERBILITY CO LTD5 patents · 0 citations
- 1829TSUBAME BHB CO LTD3 patents · 0 citations
- 1925CONTEMPORARY AMPEREX TECHNOLOGY HONG KONG LTD2 patents · 1 citations
- 2021PEREGRINE HYDROGEN INC1 patents · 1 citations
- 2117STENA POWER & LNG SOLUTIONS AS2 patents · 0 citations
- 2213UNIV MICHIGAN REGENTS2 patents · 0 citations
- 238CHONGYI ZHANGYUAN TUNGSTEN CO LTD1 patents · 1 citations
- 244GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD2 patents · 0 citations
- 251PROCESS LTD2 patents · 0 citations
Active· last 5 yrs
Sustained C01C output across the last 5 years
- 199AIR PROD & CHEM27 patents · 437 citations
- 296HALDOR TOPSOE AS44 patents · 341 citations
- 392JAPAN SCIENCE & TECH AGENCY16 patents · 147 citations
- 488AIR LIQUIDE14 patents · 156 citations
- 583EXXONMOBIL RES & ENG CO13 patents · 47 citations
- 679STAMICARBON25 patents · 123 citations
- 775STARFIRE ENERGY7 patents · 64 citations
- 871CASALE SA32 patents · 52 citations
- 967JIANGNAN ENVIRONMENTAL PROT GROUP INC12 patents · 33 citations
- 1063BATTELLE MEMORIAL INSTITUTE6 patents · 81 citations
- 1158SAUDI ARABIAN OIL CO11 patents · 21 citations
- 1254UOP LLC4 patents · 87 citations
- 1350NATRON ENERGY INC12 patents · 9 citations
- 1446MITSUBISHI HEAVY IND LTD7 patents · 47 citations
- 1542MASSACHUSETTS INST TECHNOLOGY4 patents · 20 citations
- 1638INNOSPEC LTD5 patents · 13 citations
- 1733KRAKEN TECH HOLDINGS LLC5 patents · 10 citations
- 1829AMOGY INC4 patents · 18 citations
- 1925TOKYO INST TECH5 patents · 24 citations
- 2021SUMITOMO CHEMICAL CO3 patents · 62 citations
- 2117INNOVATOR ENERGY LLC4 patents · 13 citations
- 2213THYSSENKRUPP IND SOLUTIONS AG11 patents · 20 citations
- 238ZHAO QUANBAO3 patents · 16 citations
- 244SOUTHWEST RES INST4 patents · 16 citations
- 251NOVEK ETHAN J3 patents · 7 citations
All-time canon
All-time PatentIndex Score in C01C
- 199BEND RES INC6 patents · 1,252 citations
- 296STANDARD OIL CO OHIO15 patents · 796 citations
- 392ELTRON RESEARCH INC9 patents · 509 citations
- 488KELLOGG M W CO15 patents · 650 citations
- 583ICI LTD10 patents · 340 citations
- 679AIR PROD & CHEM27 patents · 437 citations
- 775AMMONIA CASALE SA28 patents · 478 citations
- 871DEGUSSA33 patents · 382 citations
- 967HALDOR TOPSOE AS44 patents · 341 citations
- 1063BOC GROUP INC9 patents · 238 citations
- 1158NITTO CHEMICAL INDUSTRY CO LTD12 patents · 266 citations
- 1254TEXACO INC5 patents · 192 citations
- 1350STARTEC VENTURES INC5 patents · 168 citations
- 1446DU PONT20 patents · 284 citations
- 1542MONSANTO CO8 patents · 194 citations
- 1638OLIN CORP8 patents · 164 citations
- 1733GOLDENDALE ALUMINUM COMPANY8 patents · 179 citations
- 1829BERLOWITZ PAUL J13 patents · 58 citations
- 1925MATHESON TRI GAS INC10 patents · 110 citations
- 2021SHELL OIL CO6 patents · 225 citations
- 2117JAPAN SCIENCE & TECH AGENCY16 patents · 147 citations
- 2213EXXON RESEARCH ENGINEERING CO18 patents · 268 citations
- 238AIR LIQUIDE14 patents · 156 citations
- 244AIR LIQUIDE AMERICAN11 patents · 192 citations
- 251ICI PLC14 patents · 210 citations
90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth