Patent US2901975A successfully refreshed from Google Patents.
US2901975A
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Pumping unit
Assignee: Oilgear Co
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Filing: 1954-12-30
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Granted: 1959-09-01
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Expires: 1974-12-30
Abstract
No abstract record available.
Inventors
- 👤 Adolf R Grad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:10
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/04; F04B1/0404; F04B1/0452; F04B1/0465; F04B23/00; F04B23/04; F04B23/08; F04B23/10; F04B23/103; F04B1/06; F04B1/07; F04B1/10; F04B1/107; F04B1/1071; F04B1/1074; F04B1/1077; F04B49/00; F04B49/12; F04B49/123; F04B49/128
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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |