US2998783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-balanced gear pump
Assignee: Individual
•
Filing: 1958-04-25
•
Granted: 1961-09-05
•
Expires: 1978-04-25
Abstract
No abstract record available.
Inventors
- 👤 John C Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:15
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/101; F04C15/00; F04C15/0088; F04C14/00; F04C14/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1379248A
Cited
US1636259A
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US2062045A
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US1816508A
Cited
US1928300A
Cited
US2124140A
Cited
US2516589A
Cited
US2626570A
Cited
US2650544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |