US2833220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-acting fluid pressure pump
Assignee: North American Aviation Corp
•
Filing: 1954-10-08
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Granted: 1958-05-06
•
Expires: 1974-10-08
Abstract
No abstract record available.
Inventors
- 👤 Billy W Robinson
- 👤 Robert C Cruzan
- 👤 Doyle E Wilcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:36
CPC Classifications
F; F04; F04B; F04B5/00; F04B5/02; F04B17/00; F04B17/03; F04B17/04; F04B17/042; F04B17/044; F04B53/00; F04B53/008; F04B53/10; F04B53/1037
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US235947A
Cited
US461295A
Cited
US1120414A
Cited
US1684468A
Cited
US1950107A
Cited
US2690128A
Cited
DE853473C
Cited
US2673522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |