Patent US2651999A successfully refreshed from Google Patents.
US2651999A
Expired / Lapsed
US
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Rotary pump
Assignee: Individual
•
Filing: 1950-11-13
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Granted: 1953-09-15
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Expires: 1970-11-13
Abstract
No abstract record available.
Inventors
- 👤 Lester B Harrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:03
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/04; F04B1/10; F04B1/113; F04B1/1133; F04B1/1136; F02; F02M; F02M41/00; F02M41/08; F04B1/0404; F04B1/0452; F04B1/0465; F04B1/107; F04B1/1071; F04B1/1074; F04B1/1077; F02M2700/00; F02M2700/13; F02M2700/1317; F02M2700/1329
Claims Analysis
Total Claims: 0
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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) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |