Patent US2416231A successfully refreshed from Google Patents.
US2416231A
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Punctureproof fuel cell
Assignee: Standard Oil Development Co
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Filing: 1944-04-12
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Granted: 1947-02-18
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Expires: 1964-04-12
Abstract
No abstract record available.
Inventors
- 👤 Winthrope C Smith
- 👤 Joseph P Haworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:30
CPC Classifications
B; B64; B64D; B64D37/00; B64D37/02; B64D37/06; Y; Y10; Y10S; Y10S428/00; Y10S428/912; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3602; Y10T442/3642
Claims Analysis
Total Claims: 0
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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) | 1950-02-17 | 1950-08-19 | 1951-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-17 | 1954-08-19 | 1955-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-17 | 1958-08-19 | 1959-02-18 | $7700.00 | Window Closed / Lapsed |