US2850307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve stems
Assignee: Bell Aircraft Corp
•
Filing: 1955-07-01
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Granted: 1958-09-02
•
Expires: 1975-07-01
Abstract
No abstract record available.
Inventors
- 👤 Franklin J Kindl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:34
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/12; F24C3/124; F16; F16K; F16K1/00; F16K1/32; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/32442; Y10T403/32451; Y10T403/32459
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US63231A
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US727347A
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US1114123A
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US2298858A
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US2376716A
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US2438633A
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US2705119A
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US2693368A
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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) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |