US3469944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the manufacture of hydrogen for fuel cells
Assignee: BERTRAND J MAYLAND
•
Filing: 1968-05-13
•
Granted: 1969-09-30
•
Expires: 1988-05-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph P Bocard
- 👤 Richard L Harvin
- 👤 Bertrand J Mayland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:44
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/06; H01M8/0606; H01M8/0612; C; C01; C01B; C01B3/00; C01B3/02; C01B3/22; C01B3/50; C01B2203/00; C01B2203/04; C01B2203/0465; C01B2203/0475; C01B2203/0495; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2425625A
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US2700598A
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US2829113A
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US2756121A
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US3012086A
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US3088919A
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US2961062A
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US3179500A
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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) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |