US3436271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the performance of fuel cells
Assignee: Texas Instruments Inc
•
Filing: 1965-07-07
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Granted: 1969-04-01
•
Expires: 1985-07-07
Abstract
No abstract record available.
Inventors
- 👤 David F Cole
- 👤 Isaac Trachtenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:35
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/14; H01M8/144; H01M8/145; H01M8/04; H01M8/04223; H01M8/141; H01M8/142; H01M2008/147; H01M2300/00; H01M2300/0002; H01M2300/0005; H01M2300/0017; H01M2300/0048; H01M2300/0051; H01M8/143; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |