Patent US2623725A successfully refreshed from Google Patents.
US2623725A
Expired / Lapsed
US
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Safety valve
Assignee: Individual
•
Filing: 1946-10-30
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Granted: 1952-12-30
•
Expires: 1966-10-30
Abstract
No abstract record available.
Inventors
- 👤 Asa D Sands
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:03
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/24; F16K17/28; F16K17/30; F16K15/00; F16K15/02; F16K15/06; F16K15/063; F16K17/26; F16K2200/00; F16K2200/40; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/5196; Y10T137/7722; Y10T137/7837; Y10T137/7847; Y10T137/7849; Y10T137/7866; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7939
Claims Analysis
Total Claims: 0
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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) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |