Patent US2819680A successfully refreshed from Google Patents.
US2819680A
Expired / Lapsed
US
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Pump mounting for a synthetic rubber fuel cell
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1954-04-29
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Granted: 1958-01-14
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Expires: 1974-04-29
Abstract
No abstract record available.
Inventors
- 👤 Snyder Jacob Rush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:45
CPC Classifications
F; F02; F02M; F02M37/00; F02M37/04; F02M37/08; F02M37/10; F02M37/103; F04; F04D; F04D29/00; F04D29/60; F04D29/605; F04D29/606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1882616A
Cited
US2139370A
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US2326263A
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US2439161A
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US2697570A
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US2731278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |