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Patent US2843145A successfully refreshed from Google Patents.
US2843145A
Expired / Lapsed
US
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Valve mechanism
Assignee: Koehler Aircraft Products Co
•
Filing: 1953-03-27
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Granted: 1958-07-15
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Expires: 1973-03-27
Abstract
No abstract record available.
Inventors
- 👤 Gordon T Koehler
- 👤 Gustave J Koehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:40
CPC Classifications
G; G05; G05D; G05D9/00; F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/34; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7374
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1076351A
Cited
US1871044A
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US2037540A
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US2491521A
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US2698631A
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US2619108A
Cited
US2683580A
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US2699316A
Cited
US2712828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |