Stonehart Associates, Inc.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Stonehart Associates, Inc..The latest application filed is for "anode electrocatalyst for fuel cell and process of preparing same".

Company Profile

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Stonehart Associates, Inc. - Madison CT

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Anode electrocatalyst for fuel cell and process of preparing same Grant 5,922,487 - Watanabe , et al. July 13, 1	1999-07-13
Process of preparing electrode for solid polymer electrolyte fuel cell Grant 5,871,552 - Tada February 16, 1	1999-02-16
Process for forming a catalyst layer on an electrode by spray-drying Grant 5,843,519 - Tada December 1, 1	1998-12-01
Sandwich-type solid polymer electrolyte fuel cell Grant 5,800,938 - Watanabe September 1, 1	1998-09-01
Electrode for polymer electrolyte electrochemical cell and process of preparing same Grant 5,728,485 - Watanabe , et al. March 17, 1	1998-03-17
Ion exchange resins with decreased resistance to ionic conductivity Grant 5,539,002 - Watanabe July 23, 1	1996-07-23
Polymer solid-electrolyte composition and electrochemical cell using the composition Grant 5,523,181 - Stonehart , et al. June 4, 1	1996-06-04
Solid polymer electrolyte fuel cell Grant 5,472,799 - Watanabe December 5, 1	1995-12-05
Electrode structure for fuel cell Grant 5,453,332 - Sakairi , et al. September 26, 1	1995-09-26
Process of preparing metal supported catalyst having high surface area Grant 5,374,598 - Stonehart , et al. December 20, 1	1994-12-20
Process of preparing catalyst supporting highly dispersed platinum particles Grant 5,350,727 - Tsurumi , et al. September 27, 1	1994-09-27
Process of preparing solid polymer electrolyte type fuel cell Grant 5,294,232 - Sakairi , et al. March 15, 1	1994-03-15
Process of preparing catalyst supporting highly dispersed metal particles Grant 5,275,998 - Tsurumi , et al. January 4, 1	1994-01-04
Structure of ion exchange membrane Grant 5,246,792 - Watanabe September 21, 1	1993-09-21
Electrocatalyst for anode Grant 5,225,391 - Stonehart , et al. July 6, 1	1993-07-06
Electrocatalyst Grant 5,208,207 - Stonehart , et al. May 4, 1	1993-05-04

Company Registrations

NCAGE Code	1S850	STONEHART ASSOCIATES INC
CAGE Code	1S850	STONEHART ASSOCIATES INC

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