US2880751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relief valves
Assignee: Crosby Valve and Gage Co
•
Filing: 1956-12-13
•
Granted: 1959-04-07
•
Expires: 1976-12-13
Abstract
No abstract record available.
Inventors
- 👤 Robert A Tobis
- 👤 Wilbert D Greenlaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:35
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0433; F16K17/08; F16K17/087; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7738; Y10T137/7744; Y10T137/7745; Y10T137/7747; Y10T137/7754
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1685866A
Cited
US2227578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |