US2495771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diametrically cooperating vane pump
Assignee: Individual
•
Filing: 1945-10-15
•
Granted: 1950-01-31
•
Expires: 1965-10-15
Abstract
No abstract record available.
Inventors
- 👤 Richer Ella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:00
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/3441
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US353199A
Cited
GB190811435A
Cited
FR512155A
Cited
US1339347A
Cited
FR23978E
Cited
GB286240A
Cited
US1989864A
Cited
GB463418A
Cited
US2293119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-30 | 1953-08-01 | 1954-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-30 | 1957-08-01 | 1958-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-30 | 1961-08-01 | 1962-01-31 | $7700.00 | Window Closed / Lapsed |