Assignee
AIR PROD & CHEM
US·2,917 granted patents·282 pending applications·82,124 citations·filing 1970–2025
Top patents by PatentIndex Score
3,199 records- 0199US7819951B2Purification of carbon dioxideAIR PROD & CHEM·Filed 2007·Granted Oct 26, 2010·86 cites·24 claims
- 0299US6846515B2Methods for using porogens and/or porogenated precursors to provide porous organosilica glass films with low dielectric constantsAIR PROD & CHEM·Filed 2002·Granted Jan 25, 2005·667 cites·99 claims
- 0399US6552209B1Preparation of metal imino/amino complexes for metal oxide and metal nitride thin filmsAIR PROD & CHEM·Filed 2002·Granted Apr 22, 2003·572 cites·21 claims
- 0499US4784672ARegeneration of adsorbentsAIR PROD & CHEM·Filed 1987·Granted Nov 15, 1988·213 cites·10 claims
- 0598US10502649B1Apparatus and method for testing compressed gas dispensing stationsAIR PROD & CHEM·Filed 2018·Granted Dec 10, 2019·21 cites·15 claims
- 0698US9279541B2Method and system for temperature-controlled gas dispensingAIR PROD & CHEM·Filed 2013·Granted Mar 8, 2016·34 cites·23 claims
- 0798US8993072B2Halogenated organoaminosilane precursors and methods for depositing films comprising sameAIR PROD & CHEM·Filed 2012·Granted Mar 31, 2015·285 cites·36 claims
- 0898US8012446B1Recycle TSA regen gas to boiler for oxyfuel operationsAIR PROD & CHEM·Filed 2010·Granted Sep 6, 2011·57 cites·25 claims
- 0998US7909898B2Method of treating a gaseous mixture comprising hydrogen and carbon dioxideAIR PROD & CHEM·Filed 2006·Granted Mar 22, 2011·73 cites·20 claims
- 1098US7819948B2Rotary valveAIR PROD & CHEM·Filed 2007·Granted Oct 26, 2010·78 cites·15 claims
- 1198US7793675B2In-line gas purity monitoring and control systemAIR PROD & CHEM·Filed 2008·Granted Sep 14, 2010·57 cites·29 claims
- 1298US7717981B2Performance stability in shallow beds in pressure swing adsorption systemsAIR PROD & CHEM·Filed 2006·Granted May 18, 2010·76 cites·31 claims
- 1398US7651549B2Pressure swing adsorption process with improved recovery of high-purity productAIR PROD & CHEM·Filed 2006·Granted Jan 26, 2010·67 cites·29 claims
- 1498US7510601B2Portable medical oxygen concentratorAIR PROD & CHEM·Filed 2005·Granted Mar 31, 2009·115 cites·41 claims
- 1598US7438079B2In-line gas purity monitoring and control systemAIR PROD & CHEM·Filed 2005·Granted Oct 21, 2008·69 cites·20 claims
- 1698US7357138B2Method for etching high dielectric constant materials and for cleaning deposition chambers for high dielectric constant materialsAIR PROD & CHEM·Filed 2003·Granted Apr 15, 2008·559 cites·14 claims
- 1798US7122222B2Precursors for depositing silicon containing films and processes thereofAIR PROD & CHEM·Filed 2003·Granted Oct 17, 2006·634 cites·19 claims
- 1898US7098149B2Mechanical enhancement of dense and porous organosilicate materials by UV exposureAIR PROD & CHEM·Filed 2003·Granted Aug 29, 2006·624 cites·31 claims
- 1998US6662589B1Integrated high pressure NGL recovery in the production of liquefied natural gasAIR PROD & CHEM·Filed 2003·Granted Dec 16, 2003·175 cites·31 claims
- 2098US6583048B2Organosilicon precursors for interlayer dielectric films with low dielectric constantsAIR PROD & CHEM·Filed 2001·Granted Jun 24, 2003·761 cites·56 claims
- 2198US6308531B1Hybrid cycle for the production of liquefied natural gasAIR PROD & CHEM·Filed 1999·Granted Oct 30, 2001·173 cites·26 claims
- 2298US6238734B1Liquid precursor mixtures for deposition of multicomponent metal containing materialsAIR PROD & CHEM·Filed 1999·Granted May 29, 2001·570 cites·11 claims
- 2398US6114400ASynthesis gas production by mixed conducting membranes with integrated conversion into liquid productsAIR PROD & CHEM·Filed 1998·Granted Sep 5, 2000·233 cites·25 claims
- 2498US5901547AOperation method for integrated gasification combined cycle power generation systemAIR PROD & CHEM·Filed 1997·Granted May 11, 1999·185 cites·2 claims
- 2598US5298089AIn-situ generation of heat treating atmospheres using non-cryogenically produced nitrogenAIR PROD & CHEM·Filed 1992·Granted Mar 29, 1994·321 cites·22 claims
- 2698US4734115ALow pressure process for C3+ liquids recovery from process product gasAIR PROD & CHEM·Filed 1986·Granted Mar 29, 1988·234 cites·13 claims
- 2798US4717407AProcess for recovering helium from a multi-component gas streamAIR PROD & CHEM·Filed 1986·Granted Jan 5, 1988·114 cites·22 claims
- 2898US4701187AProcess for separating components of a gas streamAIR PROD & CHEM·Filed 1986·Granted Oct 20, 1987·189 cites·32 claims
- 2998US4654063AProcess for recovering hydrogen from a multi-component gas streamAIR PROD & CHEM·Filed 1985·Granted Mar 31, 1987·150 cites·20 claims
- 3098US4542114AProcess for the recovery and recycle of effluent gas from the regeneration of particulate matter with oxygen and carbon dioxideAIR PROD & CHEM·Filed 1984·Granted Sep 17, 1985·154 cites·9 claims
- 3198US4271026AControl of activated sludge wastewater treating process for enhanced phosphorous removalAIR PROD & CHEM·Filed 1979·Granted Jun 2, 1981·145 cites·26 claims
- 3298US4258849AFlushable toweletteAIR PROD & CHEM·Filed 1978·Granted Mar 31, 1981·79 cites·6 claims
- 3398US4249915ARemoval of water and carbon dioxide from airAIR PROD & CHEM·Filed 1979·Granted Feb 10, 1981·156 cites·14 claims
- 3498US4111877AAllyl esters of n-alkyl-omega-(alkyleneureido) amic acids and their synthesis and use in aqueous emulsion polymer systemsAIR PROD & CHEM·Filed 1976·Granted Sep 5, 1978·81 cites·20 claims
- 3598US4077779AHydrogen purification by selective adsorptionAIR PROD & CHEM·Filed 1976·Granted Mar 7, 1978·164 cites·15 claims
- 3697US9586819B2Process for producing hydrogenAIR PROD & CHEM·Filed 2015·Granted Mar 7, 2017·16 cites·21 claims
- 3797US9243324B2Methods of forming non-oxygen containing silicon-based filmsAIR PROD & CHEM·Filed 2013·Granted Jan 26, 2016·17 cites·22 claims
- 3897US8959998B2Ultrasonic liquid level sensing systemsAIR PROD & CHEM·Filed 2014·Granted Feb 24, 2015·20 cites·18 claims
- 3997US8016918B2Performance stability in rapid cycle pressure swing adsorption systemsAIR PROD & CHEM·Filed 2006·Granted Sep 13, 2011·84 cites·39 claims
- 4097US7332445B2Porous low dielectric constant compositions and methods for making and using sameAIR PROD & CHEM·Filed 2005·Granted Feb 19, 2008·65 cites·55 claims
- 4197US7055263B2Method for cleaning deposition chambers for high dielectric constant materialsAIR PROD & CHEM·Filed 2003·Granted Jun 6, 2006·385 cites·21 claims
- 4297US6889710B2Rotary sequencing valve with flexible port plateAIR PROD & CHEM·Filed 2002·Granted May 10, 2005·86 cites·12 claims
- 4397US6786245B1Self-contained mobile fueling stationAIR PROD & CHEM·Filed 2003·Granted Sep 7, 2004·250 cites·20 claims
- 4497US6745801B1Mobile hydrogen generation and supply systemAIR PROD & CHEM·Filed 2003·Granted Jun 8, 2004·226 cites·19 claims
- 4597US6619336B2System and method for dispensing pressurized gasAIR PROD & CHEM·Filed 2002·Granted Sep 16, 2003·118 cites·19 claims
- 4697US6537613B1Process for metal metalloid oxides and nitrides with compositional gradientsAIR PROD & CHEM·Filed 2000·Granted Mar 25, 2003·155 cites·28 claims
- 4797US6110979AUtilization of synthesis gas produced by mixed conducting membranesAIR PROD & CHEM·Filed 1998·Granted Aug 29, 2000·170 cites·29 claims
- 4897US5917136ACarbon dioxide pressure swing adsorption process using modified alumina adsorbentsAIR PROD & CHEM·Filed 1996·Granted Jun 29, 1999·234 cites·18 claims
- 4997US5681373APlanar solid-state membrane moduleAIR PROD & CHEM·Filed 1995·Granted Oct 28, 1997·109 cites·17 claims
- 5097US5435836AHydrogen recovery by adsorbent membranesAIR PROD & CHEM·Filed 1993·Granted Jul 25, 1995·130 cites·29 claims
Showing the top 50 of 3,199 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when AIR PROD & CHEM files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →