US2667887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic valve means
Assignee: Fairchild Engine and Airplane Corp
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Filing: 1949-11-10
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Granted: 1954-02-02
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Expires: 1969-11-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Theodore Hoffacker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:09
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; B; B64; B64C; B64C25/00; B64C25/32; B64C25/42; B64C25/44; F15B2211/00; F15B2211/20; F15B2211/21; F15B2211/212; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/3056; F15B2211/3059; F15B2211/31; F15B2211/3105; F15B2211/3111; F15B2211/32; F15B2211/321; F15B2211/324; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/50554; F15B2211/515; F15B2211/5151; F15B2211/5152; F15B2211/52; F15B2211/528; F15B2211/55; F15B2211/57; F15B2211/60; F15B2211/615; F15B2211/625; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/71; F15B2211/76; F15B2211/78; F15B2211/80; F15B2211/865; F15B2211/875; F15B2211/8757; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/27; Y10T137/2703; Y10T137/2705
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2208820A
Cited
US2273535A
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US2443642A
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US2467560A
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US2526570A
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US2491812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |