US2670751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick-release air valve
Assignee: Oil States Industries Inc
•
Filing: 1950-09-12
•
Granted: 1954-03-02
•
Expires: 1970-09-12
Abstract
No abstract record available.
Inventors
- 👤 Wilson John Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:52
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2557; Y10T137/5327; Y10T137/5497; Y10T137/5503; Y10T137/5515; Y10T137/5521; Y10T137/8593; Y10T137/87169; Y10T137/87233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2371293A
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US1021537A
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US1726484A
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AU950627A
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US2282188A
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GB543396A
Cited
US2358228A
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US2360839A
Cited
US2524951A
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US2488949A
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US2525799A
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US2512479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |