US3379573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated polymer matrix with fluorinated surfactant and fuel cell therewith
Assignee: Wyeth Holdings LLC
•
Filing: 1965-05-06
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Granted: 1968-04-23
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Expires: 1985-05-06
Abstract
No abstract record available.
Inventors
- 👤 Gershberg David Benedict
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:02
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/08; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2392389A
Cited
US2573639A
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US2676929A
Cited
US3202733A
Cited
US3258364A
Cited
US3281274A
Cited
US3265536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |