US2667893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relief valve
Assignee: AIR ASSOCIATES Inc
•
Filing: 1950-02-03
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Granted: 1954-02-02
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Expires: 1970-02-03
Abstract
No abstract record available.
Inventors
- 👤 Harry P Kupiec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:44
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0473; F16K17/0413; F16K47/00; F16K47/01; F16K47/011; F16K47/0111; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7765; Y10T137/7781; Y10T137/7837; Y10T137/785; Y10T137/7852; Y10T137/7853
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |