Inventor · disambiguated record
Steven J. Hamrock
Also filed as: HAMROCK STEVEN J · HAMROCK STEVEN JOSEPH
68 granted patents·12 pending applications·1,763 citations·filing 1995–2020
99Inventor score
Files with3M INNOVATIVE PROPERTIES CO55MINNESOTA MINING & MFG5FREY MATTHEW H4HAMROCK STEVEN J4PIERPONT DANIEL M2
Top patents by PatentIndex Score
80 records- 0197US7214740B2Fluorinated ionomers with reduced amounts of carbonyl end groups3M INNOVATIVE PROPERTIES CO·Filed 2005·Granted May 8, 2007·23 cites·4 claims
- 0297US6423784B1Acid functional fluoropolymer membranes and method of manufacture3M INNOVATIVE PROPERTIES CO·Filed 1999·Granted Jul 23, 2002·118 cites·11 claims
- 0397US6277512B1Polymer electrolyte membranes from mixed dispersions3M INNOVATIVE PROPERTIES CO·Filed 1999·Granted Aug 21, 2001·189 cites·24 claims
- 0497US5760126AAqueous fluorochemical compositions and abrasion-resistant coatings therefromMINNESOTA MINING & MFG·Filed 1996·Granted Jun 2, 1998·128 cites·30 claims
- 0596US7514481B2Polymer electrolytes crosslinked by e-beam3M INNOVATIVE PROPERTIES CO·Filed 2007·Granted Apr 7, 2009·20 cites·26 claims
- 0696US7348088B2Polymer electrolyte membrane3M INNOVATIVE PROPERTIES CO·Filed 2002·Granted Mar 25, 2008·108 cites·19 claims
- 0795US8367267B2High durability fuel cell components with cerium oxide additives3M INNOVATIVE PROPERTIES CO·Filed 2005·Granted Feb 5, 2013·36 cites·22 claims
- 0895US7338692B2Microporous PVDF films3M INNOVATIVE PROPERTIES CO·Filed 2003·Granted Mar 4, 2008·108 cites·9 claims
- 0995US6090895ACrosslinked ion conductive membranes3M INNOVATIVE PROPERTIES CO·Filed 1998·Granted Jul 18, 2000·93 cites·26 claims
- 1094US8962214B2Microporous PVDF films3M INNOVATIVE PROPERTIES CO·Filed 2014·Granted Feb 24, 2015·16 cites·10 claims
- 1194US8628871B2High durability fuel cell components with cerium salt additivesFREY MATTHEW H·Filed 2005·Granted Jan 14, 2014·22 cites·21 claims
- 1294US7435498B2Polymer electrolyte membranes crosslinked by nitrile trimerization3M INNOVATIVE PROPERTIES CO·Filed 2006·Granted Oct 14, 2008·11 cites·21 claims
- 1394US7265162B2Bromine, chlorine or iodine functional polymer electrolytes crosslinked by e-beam3M INNOVATIVE PROPERTIES CO·Filed 2003·Granted Sep 4, 2007·49 cites·21 claims
- 1493US6197844B1Floor finish compositions3M INNOVATIVE PROPERTIES CO·Filed 1996·Granted Mar 6, 2001·79 cites·44 claims
- 1593US5908663ATopical carpet treatmentMINNESOTA MINING & MFG·Filed 1996·Granted Jun 1, 1999·81 cites·46 claims
- 1691US8137828B2Durable fuel cell membrane electrode assembly with combined additivesPIERPONT DANIEL M·Filed 2008·Granted Mar 20, 2012·12 cites·16 claims
- 1790US6863838B2Zwitterionic imides3M INNOVATIVE PROPERTIES CO·Filed 2001·Granted Mar 8, 2005·24 cites·30 claims
- 1890US6727386B2Aromatic imide and aromatic methylidynetrissulfonyl compounds and method of making3M INNOVATIVE PROPERTIES CO·Filed 2001·Granted Apr 27, 2004·17 cites·22 claims
- 1990US5514493APerfluoroalkylsulfonates, sulfonimides, and sulfonyl methides, and electrolytes containing themMINNESOTA MINING & MFG·Filed 1995·Granted May 7, 1996·111 cites·14 claims
- 2089US11492431B2Fluorinated copolymer having sulfonyl pendant groups and compositions and articles including the same3M INNOVATIVE PROPERTIES COMPANY·Filed 2018·Granted Nov 8, 2022·2 cites·11 claims
- 2189US9023496B2Durable fuel cell membrane electrode assembly with combined additivesPIERPONT DANIEL M·Filed 2012·Granted May 5, 2015·4 cites·18 claims
- 2289US7071271B2Aqueous emulsion polymerization of functionalized fluoromonomers3M INNOVATIVE PROPERTIES CO·Filed 2003·Granted Jul 4, 2006·32 cites·42 claims
- 2389US5888290AComposition and process for imparting durable repellency to substratesMINNESOTA MINING & MFG·Filed 1996·Granted Mar 30, 1999·73 cites·30 claims
- 2488US7517604B2Fuel cell electrolyte membrane with acidic polymer3M INNOVATIVE PROPERTIES CO·Filed 2005·Granted Apr 14, 2009·10 cites·18 claims
- 2587US8765327B2Fuel cell electrodes with conduction networksHAUG ANDREW T·Filed 2010·Granted Jul 1, 2014·8 cites·12 claims
- 2687US7838138B2Fuel cell electrolyte membrane with basic polymer3M INNOVATIVE PROPERTIES CO·Filed 2005·Granted Nov 23, 2010·9 cites·10 claims
- 2787US6063522AElectrolytes containing mixed fluorochemical/hydrocarbon imide and methide salts3M INNOVATIVE PROPERTIES CO·Filed 1998·Granted May 16, 2000·90 cites·32 claims
- 2886US9276284B2Fuel cell subassemblies incorporating subgasketed thrifted membranes3M INNOVATIVE PROPERTIES CO·Filed 2013·Granted Mar 1, 2016·3 cites·10 claims
- 2986US7572534B2Fuel cell membrane electrode assembly3M INNOVATIVE PROPERTIES CO·Filed 2004·Granted Aug 11, 2009·21 cites·27 claims
- 3086US6649295B2Membrane electrode assembly having annealed polymer electrolyte membrane3M INNOVATIVE PROPERTIES CO·Filed 2001·Granted Nov 18, 2003·37 cites·15 claims
- 3185US10570524B2Ionic polymer membrane for a carbon dioxide electrolyzer3M INNOVATIVE PROPERTIES CO·Filed 2015·Granted Feb 25, 2020·2 cites·21 claims
- 3285US6780472B2Floor finish compositions3M INNOVATIVE PROPERTIES CO·Filed 2001·Granted Aug 24, 2004·25 cites·18 claims
- 3384US7060738B2Polymer electrolytes crosslinked by ultraviolet radiation3M INNOVATIVE PROPERTIES CO·Filed 2003·Granted Jun 13, 2006·20 cites·16 claims
- 3484US6420607B1Cationically polymerizable compositions capable of being coated by electrostatic assistance3M INNOVATIVE PROPERTIES CO·Filed 1997·Granted Jul 16, 2002·21 cites·3 claims
- 3582US9034538B2Casting solution and method for making a polymer electrolyte membraneFREY MATTHEW H·Filed 2010·Granted May 19, 2015·2 cites·49 claims
- 3682US7803847B2Fuel cell membrane electrode assembly3M INNOVATIVE PROPERTIES CO·Filed 2009·Granted Sep 28, 2010·3 cites·21 claims
- 3780US9728801B2Durable fuel cell membrane electrode assembly with combined additives3M INNOVATIVE PROPERTIES CO·Filed 2015·Granted Aug 8, 2017·1 cites·18 claims
- 3880US9711816B2Low equivalent weight polymersLOCHHAAS KAI H·Filed 2012·Granted Jul 18, 2017·3 cites·19 claims
- 3980US9419300B2Proton conducting materialsHAMROCK STEVEN JOSEPH·Filed 2011·Granted Aug 16, 2016·5 cites·17 claims
- 4079US7112614B2Crosslinked polymer3M INNOVATIVE PROPERTIES CO·Filed 2003·Granted Sep 26, 2006·14 cites·4 claims
- 4179US7060756B2Polymer electrolyte with aromatic sulfone crosslinking3M INNOVATIVE PROPERTIES CO·Filed 2003·Granted Jun 13, 2006·19 cites·6 claims
- 4278US10446868B2Fuel cell subassemblies incorporating subgasketed thrifted membranes3M INNOVATIVE PROPERTIES CO·Filed 2016·Granted Oct 15, 2019·1 cites·13 claims
- 4378US6683209B2Aromatic imide and aromatic methylidynetrissulfonyl compounds and method of making3M INNOVATIVE PROPERTIES CO·Filed 2003·Granted Jan 27, 2004·6 cites·4 claims
- 4477US8227140B2Proton conducting materialsHAMROCK STEVEN J·Filed 2011·Granted Jul 24, 2012·2 cites·28 claims
- 4577US8206874B2Polymer electrolytes including heteropolyacidsHAMROCK STEVEN J·Filed 2008·Granted Jun 26, 2012·4 cites·29 claims
- 4677US7304101B2Method of purifying a dispersion of ionic fluoropolymer3M INNOVATIVE PROPERTIES CO·Filed 2004·Granted Dec 4, 2007·17 cites·29 claims
- 4776US7285349B2Polymer electrolyte membrane and method of making3M INNOVATIVE PROPERTIES CO·Filed 2003·Granted Oct 23, 2007·13 cites·24 claims
- 4876US7074841B2Polymer electrolyte membranes crosslinked by nitrile trimerizationYANDRASITS MICHAEL A·Filed 2003·Granted Jul 11, 2006·12 cites·7 claims
- 4975US8637205B2Fuel cell subassemblies incorporating subgasketed thrifted membranesIVERSON ERIC J·Filed 2010·Granted Jan 28, 2014·2 cites·13 claims
- 5072US7847035B2Polymer electrolyte with aromatic sulfone crosslinking3M INNOVATIVE PROPERTIES CO·Filed 2006·Granted Dec 7, 2010·3 cites·14 claims
Showing the top 50 of 80 patent records by PatentIndex Score.
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