US2880677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable volume vane pump
Assignee: Individual
•
Filing: 1956-01-23
•
Granted: 1959-04-07
•
Expires: 1976-01-23
Abstract
No abstract record available.
Inventors
- 👤 James L Grupen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:09
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/10; F04C14/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE24064E
Cited
FR733547A
Cited
FR41750E
Cited
US2570411A
Cited
US2498826A
Cited
US2612110A
Cited
US2752851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |