US2122020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping apparatus
Assignee: Lincoln Engineering Co
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Filing: 1936-09-16
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Granted: 1938-06-28
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Expires: 1956-09-16
Abstract
No abstract record available.
Inventors
- 👤 Frank S Barks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:36
CPC Classifications
F; F04; F04B; F04B7/00; F04B7/04; F04B23/00; F04B23/04; F04B23/06; F04B5/00; F04B53/00; F04B53/10; F04B53/102; F04B53/103; F04B53/12; F04B53/125; F04B53/126; F04B53/14; F04B53/144; F04B9/00; F04B9/08; F04B9/12; F04B9/123; F04B9/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-06-27 | 1941-12-27 | 1942-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-06-27 | 1945-12-27 | 1946-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-06-27 | 1949-12-27 | 1950-06-28 | $7700.00 | Window Closed / Lapsed |