US2812719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump
Assignee: HUMPHREY L NASH JR
•
Filing: 1954-07-20
•
Granted: 1957-11-12
•
Expires: 1974-07-20
Abstract
No abstract record available.
Inventors
- 👤 Humphrey L Nash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:03
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/30; F04C2/40; F04C2/46; F04C2/34; F04C2/356; F04C2/3568
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US678338A
Cited
US723686A
Cited
US791919A
Cited
US1963350A
Cited
US1936467A
Cited
US1972302A
Cited
US2006298A
Cited
US2142867A
Cited
US2521592A
Cited
US2583633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |