Patent US2744502A successfully refreshed from Google Patents.
US2744502A
Expired / Lapsed
US
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Pneumatic control apparatus
Assignee: Simmonds Aerocessories Inc
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Filing: 1952-08-16
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Granted: 1956-05-08
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Expires: 1972-08-16
Abstract
No abstract record available.
Inventors
- 👤 Frantz William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:45
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH112466A
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US1540181A
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GB295290A
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US2138148A
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US2185449A
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DE741199C
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US2225321A
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US2372273A
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US2375204A
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US2374154A
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US2432877A
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US2651316A
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US2670716A
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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) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |