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US2644402A
Expired / Lapsed
US
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Self-sealing rotor for fluid transferring devices
Assignee: Individual
•
Filing: 1949-10-06
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Granted: 1953-07-07
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Expires: 1969-10-06
Abstract
No abstract record available.
Inventors
- 👤 Irvin H Lehman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:53
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/10; F01C21/102; G; G01; G01F; G01F3/00; G01F3/02; G01F3/04; G01F3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2052474A
Cited
US2258371A
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US2189356A
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US2455194A
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US2460952A
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US2499163A
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US2466440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |