US2773453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pumps
Assignee: Individual
•
Filing: 1952-09-12
•
Granted: 1956-12-11
•
Expires: 1972-09-12
Abstract
No abstract record available.
Inventors
- 👤 Gemeinhardt William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:08
CPC Classifications
F; F04; F04D; F04D33/00; F04D11/00; F04D11/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US440798A
Cited
US495213A
Cited
US678223A
Cited
US1434741A
Cited
US1608547A
Cited
US1913758A
Cited
US2107090A
Cited
US2574617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |