US2546571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature-compensated pressureresponsive diaphragm
Assignee: ZF International UK Ltd
•
Filing: 1945-04-30
•
Granted: 1951-03-27
•
Expires: 1965-04-30
Abstract
No abstract record available.
Inventors
- 👤 Watson Ernest Ansley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:38
CPC Classifications
F; F02; F02B; F02B1/00; F02M; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/438; F02M2700/4388
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US805720A
Cited
US1418953A
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US2150771A
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US2161743A
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US2299234A
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US2235314A
Cited
US2292125A
Cited
US2376892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |