US2491670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump
Assignee: LIPMAN PATENTS Corp
•
Filing: 1943-06-05
•
Granted: 1949-12-20
•
Expires: 1963-06-05
Abstract
No abstract record available.
Inventors
- 👤 Carl E L Lipman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:31
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0827; F01C21/0836; Y; Y10; Y10S; Y10S277/00; Y10S277/911; Y10S277/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2049092A
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US2126200A
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US2302907A
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US2278740A
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US2287369A
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US2283033A
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US2311162A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |