Patent US3078379A successfully refreshed from Google Patents.
Patent US4773182A successfully refreshed from Google Patents.
US2965041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump apparatus
Assignee: Individual
•
Filing: 1956-05-16
•
Granted: 1960-12-20
•
Expires: 1976-05-16
Abstract
No abstract record available.
Inventors
- 👤 Clark Robert Edward David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:54
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1253; F04B43/0009; F04B43/0054; F04B43/0072; F04B43/1284; G; G01; G01F; G01F11/00; G01F11/10; G01F11/12; G01F11/125
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |