US2740425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High capacity, gas tight seating, adjustable safety valve
Assignee: Frick Co Inc
•
Filing: 1951-06-20
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Granted: 1956-04-03
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Expires: 1971-06-20
Abstract
No abstract record available.
Inventors
- 👤 Milton W Garland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:53
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/48; F16K17/00; F16K17/02; F16K17/04; F16K17/0433; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7738; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US217745A
Cited
US1551547A
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FR813229A
Cited
GB121570A
Cited
GB201708A
Cited
US2292294A
Cited
US2352249A
Cited
US2355916A
Cited
US2443851A
Cited
US2631605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |