Patent US2821929A successfully refreshed from Google Patents.
US2821929A
Expired / Lapsed
US
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Gear type positive displacement pump
Assignee: Bendix Aviation Corp
•
Filing: 1954-06-21
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Granted: 1958-02-04
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Expires: 1974-06-21
Abstract
No abstract record available.
Inventors
- 👤 Richard R Erick
- 👤 John T Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:25
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/082; F04C2/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1348773A
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US1719025A
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US1686867A
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US1909418A
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US2188848A
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US2281767A
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US2344628A
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US2604051A
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US2601003A
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US2601004A
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US2498790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |