Inventor
Stephen A. Campbell
Inventor
Maple Ridge, CA
Overview
26→
Patents
1989–2021
Patent span
General tagging of new technological developments
Primary field (CPC Y)
Patents· 26 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Mprimary
H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy32%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution32%
Y10TTechnical subjects covered by former us classification8%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry6%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h103%
B60LPropulsion of electrically-propelled vehicles2%
C01GCompounds containing metals not covered by subclasses c01d or c01f2%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds2%
C07CAcyclic or carbocyclic compounds2%
C23CCoating metallic material2%
PatentTitleYear
11,018,331Phosphate stabilized lithium ion battery cathode20219,799,893'Catalyst support for fuel cell'20178,722,284'Synthesis of stable and durable catalyst composition for fuel cell'20147,303,831'Antifreeze cooling subsystem'20077,125,820'Non-noble metal catalysts for the oxygen reduction reaction'20067,032,894'Flow distributor for monolith reactors'20066,974,647'Fuel cell fluid distribution layer having integral sealing capability'20056,936,370'Solid polymer fuel cell with improved voltage reversal tolerance'20056,896,792'Method and device for improved catalytic activity in the purification of fluids'20056,683,011'Process for forming hafnium oxide films'20046,638,650'Method and apparatus for detecting transfer leaks in fuel cells and fuel cell stacks'20036,623,707'Monolithic catalyst dehydrogenation reactor'20036,613,464'Method and apparatus for reducing reactant crossover in a liquid feed electrochemical fuel cell'20036,610,432'Impregnation of microporous electrocatalyst particles for improving performance in an electrochemical fuel cell'20036,548,202'Carbon-supported catalysts for fuel cells'20036,475,651'Method and apparatus for detecting transfer leaks in fuel cells'20026,350,538'Fuel cell with fluid distribution layer having intergral sealing capability'20026,306,536'Method of reducing fuel cell performance degradation of an electrode comprising porous components'20016,122,440'Optical heating device for rapid thermal processing (RTP) system'20006,074,773'Impregnation of microporous electrocatalyst particles for improving performance in an electrochemical fuel cell'20006,060,190'Electrochemical fuel cell membrane electrode assembly with porous electrode substrate'20005,976,726'Electrochemical cell with fluid distribution layer having integral sealing capability'19995,874,182'Method and apparatus for reducing reactant crossover in a liquid feed electrochemical fuel cell'19995,863,673'Porous electrode substrate for an electrochemical fuel cell'19995,672,439'Method and apparatus for reducing reactant crossover in an electrochemical fuel cell'19974,845,542'Interconnect for layered integrated circuit assembly'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1997–2006Patents assigned to BALLARD POWER SYSTEMS (15)· patent assignee history
1997–2003Based in Coquitlam, CA· patent location history
1999–2017Based in Maple Ridge, CA· patent location history
2000–2004Patents assigned to UNIV MINNESOTA (2)· patent assignee history
2000–2004Based in Shoreview, MN, US· patent location history
2003–2006Patents assigned to CORNING INC (2)· patent assignee history
2003–2006Based in Corning, NY, US· patent location history
2014–2017Patents assigned to CAMPBELL STEPHEN A (2)· patent assignee history
2014–2017Patents assigned to DAIMLER AG (2)· patent assignee history
2021Based in Burnaby, CA· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BALLARD POWER SYSTEMS | 15 | 1997–2006 |
| CAMPBELL STEPHEN Aself | 2 | 2014–2017 |
| CORNING INC | 2 | 2003–2006 |
| DAIMLER AG | 2 | 2014–2017 |
| UNIV MINNESOTA | 2 | 2000–2004 |
Locations
| Location | Patents | Span |
|---|---|---|
| Maple Ridge, CA | 17 | 1999–2017 |
| Coquitlam, CA | 3 | 1997–2003 |
| Corning, New York, US | 2 | 2003–2006 |
| Shoreview, Minnesota, US | 2 | 2000–2004 |
| Burnaby, CA | 1 | 2021 |