US3248267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic electrode and fuel cell containing the same
Assignee: Wyeth Holdings LLC
•
Filing: 1962-12-10
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Granted: 1966-04-26
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Expires: 1982-12-10
Abstract
No abstract record available.
Inventors
- 👤 Stanley H Langer
- 👤 Henry P Landi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:08
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR PREPARING A FORMED CELL ELECTRODE WHICH COMPRISES FORMING AN ELECTRODE COMPOSITION COMPRISING FROM ABOUT 1% TO ABOUT 75% OF A FINELY DIVIDED OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF GROUPS III, IV AND V OF THE PERIODIC TABLE, A BINDERWATERPROOFING AGENT AND A CATALYTICALLY EFFECTIVE AMOUNT OF A CATALYTIC METAL, AND THEREAFTER REMOVIG A PORTION OF SAID METAL OXIDE FROM SAID MOLDED ELECTRODE SO THAT THE FINAL FORMED ELECTRODE CONTAINS FROM ABOUT 0.01 TO ABOUT 5% BASED ON THE WEIGHT OF SAID ELECTRODE OF SAID METAL OXIDE.
Claim 2
Dependent Claim
23 words
A FUEL CELL ELECTRODE COMPRISING A FINELY DIVIDED SILICA, POLYTETRAFLUOROETHYLENE AS A BINDER-WATERPROOFING AGENT AND A CATALYTICALLY EFFECTIVE AMOUNT OF A PLATINUM METAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |