Topic leaderboard
Treatment of water, waste water & sludge
Ranked by the PatentIndex Score — a 1–99 percentile within C02F · public-visibility date · generated 2026
top 25 per window · public-visibility date
Rising· last 2 yrs
Inventors whose newest C02F patents became public in the last 2 years — the current frontier
- 199Dennis M. Treu36 patents · 3,591 citations
- 296Jeffrey H. Burbank33 patents · 1,151 citations
- 392James M. Brugger25 patents · 1,081 citations
- 488Gary C. Ganzi37 patents · 2,698 citations
- 583Frederick C. Wilkins42 patents · 1,877 citations
- 679Li-Shiang Liang60 patents · 985 citations
- 775Brian C. Green12 patents · 314 citations
- 871Rodney Herrington19 patents · 513 citations
- 967Dean Kamen37 patents · 552 citations
- 1063William D. Chandler, Jr.39 patents · 469 citations
- 1158E. H. Kelle Zeiher11 patents · 391 citations
- 1254Ryan K. Larocque31 patents · 454 citations
- 1350Andrew A. Schnellinger27 patents · 450 citations
- 1446Christopher C. Langenfeld25 patents · 439 citations
- 1542Otis L. Clapp24 patents · 434 citations
- 1638Prashant Bhat25 patents · 434 citations
- 1733Stanley B. Smith, Iii24 patents · 434 citations
- 1829Goetz Friederichs24 patents · 346 citations
- 1925Ehud Levy26 patents · 537 citations
- 2021Christopher Kurth14 patents · 229 citations
- 2117Mark A. Kozubal12 patents · 129 citations
- 2213Richard Eugene Macur12 patents · 129 citations
- 238Yuval Charles Avniel12 patents · 129 citations
- 244Whitaker Ben Irvin, Sr.21 patents · 308 citations
- 251William S. Carey34 patents · 459 citations
Active· last 5 yrs
Sustained C02F output across the last 5 years
- 199Dennis M. Treu36 patents · 3,591 citations
- 296Roy W. Kuennen26 patents · 3,312 citations
- 392Terry L. Lautzenheiser36 patents · 2,849 citations
- 488Steven Kristian Pedersen36 patents · 2,853 citations
- 583Pierre Cote66 patents · 4,176 citations
- 679Jeffrey H. Burbank33 patents · 1,151 citations
- 775James M. Brugger25 patents · 1,081 citations
- 871Gary C. Ganzi37 patents · 2,698 citations
- 967Frederick C. Wilkins42 patents · 1,877 citations
- 1063Irving D. Elyanow11 patents · 920 citations
- 1158Karl Fritze18 patents · 812 citations
- 1254Li-Shiang Liang60 patents · 985 citations
- 1350Vitold M. Bakhir13 patents · 704 citations
- 1446Nidal A. Samad16 patents · 742 citations
- 1542Brian C. Green12 patents · 314 citations
- 1638Raymond P. Denkewicz, Jr.22 patents · 890 citations
- 1733Ayala Barak25 patents · 480 citations
- 1829Yoshinori Nishiki32 patents · 955 citations
- 1925Yukinari Yamashita12 patents · 423 citations
- 2021Rodney Herrington19 patents · 513 citations
- 2117Prakash Narayan Govindan56 patents · 771 citations
- 2213John H. Lienhard34 patents · 531 citations
- 238Jason A. Demers24 patents · 387 citations
- 244Koji Yamanaka22 patents · 546 citations
- 251Mansour S. Bader32 patents · 806 citations
All-time canon
Career PatentIndex Score in C02F
- 199Thomas M. Feldsein10 patents · 2,250 citations
- 296Dennis M. Treu36 patents · 3,591 citations
- 392Rodney S. Kenley14 patents · 2,628 citations
- 488Frederick H. Peter, Jr.9 patents · 1,939 citations
- 583David W. Baarman79 patents · 9,107 citations
- 679Kenneth E. Pawlak8 patents · 1,543 citations
- 775Dawn Matthews7 patents · 1,078 citations
- 871Roy W. Kuennen26 patents · 3,312 citations
- 967Ronald C. Markham20 patents · 2,970 citations
- 1063Scott A. Mollema20 patents · 2,927 citations
- 1158Terry L. Lautzenheiser36 patents · 2,849 citations
- 1254Mailvaganam Mahendran19 patents · 1,961 citations
- 1350John J. Merianos16 patents · 3,580 citations
- 1446Alfonso N. Petrocci13 patents · 3,138 citations
- 1542Harold A. Green13 patents · 3,138 citations
- 1638Henry Behmann42 patents · 3,411 citations
- 1733Wayne Henshaw11 patents · 1,208 citations
- 1829Christopher B. Houghton21 patents · 1,533 citations
- 1925Stephen J. Mcphilliamy21 patents · 1,533 citations
- 2021Steven Kristian Pedersen36 patents · 2,853 citations
- 2117Ake Adolf Deutschmann8 patents · 1,256 citations
- 2213Tom L. Brose5 patents · 752 citations
- 238Pierre Cote66 patents · 4,176 citations
- 244Dennis J. Denen9 patents · 1,566 citations
- 251Jeffrey H. Burbank33 patents · 1,151 citations
Rising· last 2 yrs
The top-scoring C02F patents made public in the last 2 years
- 199US12275661B2✦ AIMethods and systems of iodine capture from aqueous solutions6 cites · 202568% earned
- 296US12311336B1✦ AINanocomposite for purification of contaminated water3 cites · 202580% earned
- 392US12181348B1✦ AIFloating thermometer with disinfection device6 cites · 202485% earned
- 488US12091330B2Apparatus and process for removing PFAS and PFAS compounds from water6 cites · 202478% earned
- 583US12049768B2Water purification, sterilization and disinfection lamp4 cites · 202482% earned
- 679US12384703B2Disinfection lamp with underwater light projection effect2 cites · 202576% earned
- 775US12163326B1System for capturing and destroying hair or waste within a commercial shower drain7 cites · 202486% earned
- 871US12104362B1Assessing and remediating well clogging from bacteria, systems, apparatuses, and methods3 cites · 202463% earned
- 967US12275655B1Metal oxide-based nanocomposite material for water decontamination3 cites · 202572% earned
- 1063US12122691B1Removal of fluoroalkyl compounds from water using galvanic cell3 cites · 202472% earned
- 1158US12090429B1Filter device, faucet water purifier and spraying process thereof3 cites · 202480% earned
- 1254US11946282B1Moving devices used in liquid and pool cleaning robots4 cites · 202470% earned
- 1350US12178196B2Recirculation aquaculture system and method4 cites · 202482% earned
- 1446US12036485B1Continuous flow cold water extraction9 cites · 202487% earned
- 1542US12172129B2Modular extraction apparatus2 cites · 202455% earned
- 1638US12090465B1Method to improve compatibility of waste polypropylene and polyethylene blend via thermall2 cites · 202458% earned
- 1733US12473742B2Cleaning device1 cites · 202546% earned
- 1829US12330336B2Methods and compositions for treatment of concrete wash water3 cites · 202467% earned
- 1925US12194395B1Replaceable filter cartridge assembly2 cites · 202561% earned
- 2021US12128344B2Pool filter assembly3 cites · 202467% earned
- 2117USD1076660SBracket3 cites · 202567% earned
- 2213US12146825B1System and methods for assessment of scale deposits in pipelines2 cites · 202467% earned
- 238US12168615B1Method and system for sustainable brine treatment and heavy metal purification using recyc2 cites · 202467% earned
- 244US12239113B2Livestock management3 cites · 202472% earned
- 251US12275654B1Sustainable brine treatment system and process2 cites · 202567% earned
Active· last 5 yrs
The top-scoring C02F patents of the last 5 years
- 199US11623830B1✦ AITrailer with loading and unloading system21 cites · 202374% earned
- 296US11853038B1✦ AIOptimal control method of pollutant flux into coastal waters based on virtual discharge am15 cites · 202389% earned
- 392US11185796B1✦ AIFast and high-capacity intelligent cellulose-based oil-absorbing material and preparation 25 cites · 202190% earned
- 488US11111255B1Zirconium-based metal-organic framework material UiO-66(Zr), rapid room-temperature prepar24 cites · 202190% earned
- 583US11254586B1Selected serving and flavored sparkling beverage maker23 cites · 202282% earned
- 679US11471798B2Liquid filtration system23 cites · 202290% earned
- 775US11219860B1CO2 capture process with electrolytic regeneration19 cites · 202285% earned
- 871US11485653B2Methods of metering delivery of caustic soda for treatment of water22 cites · 202190% earned
- 967US11459744B2In-pipe storm water filter18 cites · 202289% earned
- 1063US11291183B1Pet hydration system17 cites · 202281% earned
- 1158US11946001B2Process and system for producing fuel10 cites · 202378% earned
- 1254US11161753B1Solar-powered autonomous robotic water surface maintenance and cleaning system16 cites · 202189% earned
- 1350US11331616B2Pool filter assembly19 cites · 202281% earned
- 1446US10982425B1Apparatus for capturing and destroying hair within a shower drain19 cites · 202181% earned
- 1542US12275661B2Methods and systems of iodine capture from aqueous solutions6 cites · 202568% earned
- 1638US11679999B2Method and apparatus to separate per-and polyfluoroalkyl substances (PFAS) from water usin12 cites · 202382% earned
- 1733US12311336B1Nanocomposite for purification of contaminated water3 cites · 202580% earned
- 1829US10988389B1Water sterilization cap with removable cartridge15 cites · 202189% earned
- 1925US12181348B1Floating thermometer with disinfection device6 cites · 202485% earned
- 2021US11780753B2Destruction of PFAS via an oxidation process and apparatus suitable for transportation to 11 cites · 202374% earned
- 2117US11638916B1Ion lithium extraction apparatus11 cites · 202388% earned
- 2213US11344572B2Methods for producing ultrapure water that generates increased cellular permeation13 cites · 202179% earned
- 238US11332389B1Recylable multifunctional composites for metal ion removal from water13 cites · 202288% earned
- 244US11554333B2Method of filtering water being returned to a swimming pool13 cites · 202188% earned
- 251US11502323B1Reverse electrodialysis cell and methods of use thereof10 cites · 202275% earned
All-time canon
The defining C02F patents of the whole record
- 199US4452773A✦ AIMagnetic iron-dextran microspheres915 cites · 198495% earned
- 296US4036749A✦ AIPurification of saline water872 cites · 197795% earned
- 392US5591344A✦ AIHot water disinfection of dialysis machines, including the extracorporeal circuit thereof644 cites · 199781% earned
- 488US5993378AElectro-optical instruments and methods for treating disease604 cites · 199995% earned
- 583US6949196B2Methods and systems for improved dosing of a chemical treatment, such as chlorine dioxide,599 cites · 200595% earned
- 679US5972196AElectrochemical production of ozone and hydrogen peroxide572 cites · 199990% earned
- 775US6436299B1Water treatment system with an inductively coupled ballast553 cites · 200295% earned
- 871US7396491B2UV-emitting phosphor and lamp containing same523 cites · 200795% earned
- 967US4026945AAnti-microbial quaternary ammonium co-polymers521 cites · 197795% earned
- 1063US6825620B2Inductively coupled ballast circuit518 cites · 200392% earned
- 1158US4025627AMicrobiocidal polymeric quaternary ammonium compounds512 cites · 197795% earned
- 1254US4025617AAnti-microbial quaternary ammonium co-polymers512 cites · 197795% earned
- 1350US4005193AMicrobiocidal polymeric quaternary ammonium compounds511 cites · 197795% earned
- 1446US3966904AQuaternary ammonium co-polymers for controlling the proliferation of bacteria495 cites · 197695% earned
- 1542US4025653AMicrobiocidal polymeric quaternary ammonium compounds493 cites · 197795% earned
- 1638US6673250B2Radio frequency identification system for a fluid treatment system471 cites · 200395% earned
- 1733US6731071B2Inductively powered lamp assembly465 cites · 200386% earned
- 1829US5463176ALiquid waste oxygenation453 cites · 199595% earned
- 1925US7514058B1Apparatus for on-site production of nitrate ions410 cites · 200992% earned
- 2021US7385357B2Inductively coupled ballast circuit409 cites · 200785% earned
- 2117US6327994B1Scavenger energy converter system its new applications and its control systems406 cites · 200195% earned
- 2213US4061724ACrystalline silica404 cites · 197795% earned
- 238US6182453B1Portable, potable water recovery and dispensing apparatus402 cites · 200195% earned
- 244US5863421AHemodialysis machine with automatic priming by induced pressure pulses395 cites · 199980% earned
- 251US4628078AAcrylamide-dialkylaminoacrylate-dialkylaminomethacrylate cationic polyelectrolytes and the392 cites · 198695% earned
Rising· last 2 yrs
Assignees whose newest C02F patents became public in the last 2 years — the current frontier
- 199NXSTAGE MEDICAL INC37 patents · 973 citations
- 296PALL CORP26 patents · 1,306 citations
- 392CLACK CORP18 patents · 749 citations
- 488KURITA WATER IND LTD148 patents · 1,705 citations
- 583DEKA PRODUCTS LP48 patents · 612 citations
- 679ASAHI CHEMICAL IND43 patents · 737 citations
- 775PROCTER & GAMBLE60 patents · 1,388 citations
- 871TORAY INDUSTRIES67 patents · 774 citations
- 967MASSACHUSETTS INST TECHNOLOGY82 patents · 903 citations
- 1063ORGANO CORP72 patents · 1,128 citations
- 1158US NAVY59 patents · 1,462 citations
- 1254MITSUBISHI ELECTRIC CORP66 patents · 1,041 citations
- 1350NASA21 patents · 626 citations
- 1446CALGON CARBON CORP33 patents · 672 citations
- 1542UNIV WASHINGTON12 patents · 375 citations
- 1638KUBOTA KK38 patents · 559 citations
- 1733WHIRLPOOL CO55 patents · 599 citations
- 1829ECOLAB USA INC236 patents · 590 citations
- 1925LG ELECTRONICS INC149 patents · 679 citations
- 2021SAMSUNG ELECTRONICS CO LTD145 patents · 1,181 citations
- 2117SAUDI ARABIAN OIL CO159 patents · 291 citations
- 2213KURARAY CO28 patents · 346 citations
- 238UNIV FLORIDA28 patents · 409 citations
- 244UNIV MINNESOTA24 patents · 353 citations
- 251QWTIP LLC17 patents · 161 citations
Active· last 5 yrs
Sustained C02F output across the last 5 years
- 199ACCESS BUSINESS GROUP INT LLC90 patents · 7,696 citations
- 296NXSTAGE MEDICAL INC37 patents · 973 citations
- 392UNIV CALIFORNIA113 patents · 3,108 citations
- 488LYNNTECH INC26 patents · 2,224 citations
- 583PALL CORP26 patents · 1,306 citations
- 679CLACK CORP18 patents · 749 citations
- 775AIR PROD & CHEM41 patents · 1,483 citations
- 8713M INNOVATIVE PROPERTIES CO58 patents · 1,471 citations
- 967BATTELLE MEMORIAL INSTITUTE62 patents · 1,806 citations
- 1063EBARA CORP75 patents · 1,597 citations
- 1158ABTECH INDUSTRIES INC16 patents · 652 citations
- 1254BAYER AG105 patents · 2,590 citations
- 1350NIPPON CATALYTIC CHEM IND42 patents · 1,189 citations
- 1446KURITA WATER IND LTD148 patents · 1,705 citations
- 1542DEKA PRODUCTS LP48 patents · 612 citations
- 1638ASAHI CHEMICAL IND43 patents · 737 citations
- 1733PROCTER & GAMBLE60 patents · 1,388 citations
- 1829ALBEMARLE CORP40 patents · 916 citations
- 1925TOTO LTD16 patents · 678 citations
- 2021US ARMY44 patents · 998 citations
- 2117TORAY INDUSTRIES67 patents · 774 citations
- 2213MASSACHUSETTS INST TECHNOLOGY82 patents · 903 citations
- 238UNIV NORTH CAROLINA STATE13 patents · 635 citations
- 244ORGANO CORP72 patents · 1,128 citations
- 251US NAVY59 patents · 1,462 citations
All-time canon
All-time PatentIndex Score in C02F
- 199AKSYS LTD26 patents · 4,078 citations
- 296ACCESS BUSINESS GROUP INT LLC90 patents · 7,696 citations
- 392ZENON ENVIRONMENTAL INC66 patents · 7,760 citations
- 488MILLMASTER ONYX CORP8 patents · 3,073 citations
- 583BAARMAN DAVID W14 patents · 1,014 citations
- 679NXSTAGE MEDICAL INC37 patents · 973 citations
- 775UNIV CALIFORNIA113 patents · 3,108 citations
- 871AMWAY CORP16 patents · 1,800 citations
- 967LYNNTECH INC26 patents · 2,224 citations
- 1063KOSLOW TECHN CORP13 patents · 1,206 citations
- 1158MILLIPORE CORP26 patents · 2,240 citations
- 1254ECOLAB INC34 patents · 1,667 citations
- 1350IONICS35 patents · 2,226 citations
- 1446INNOVA PURE WATER INC19 patents · 1,624 citations
- 1542RECOVERY ENG INC11 patents · 1,052 citations
- 1638UNITED STATES FILTER CORP60 patents · 3,324 citations
- 1733NALCO CHEMICAL CO347 patents · 10,747 citations
- 1829CALERA CORP9 patents · 814 citations
- 1925ALLIED COLLOIDS LTD33 patents · 1,571 citations
- 2021MODAR INC10 patents · 962 citations
- 2117PALL CORP26 patents · 1,306 citations
- 2213US FILTER WASTEWATER GROUP INC5 patents · 524 citations
- 238CUNO INC14 patents · 1,015 citations
- 244UNIV TEXAS29 patents · 1,203 citations
- 251MITSUBISHI RAYON CO24 patents · 1,019 citations
90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth