US2637331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety cutoff valve
Assignee: Sullivan Valve and Engineering Co
•
Filing: 1952-04-23
•
Granted: 1953-05-05
•
Expires: 1972-04-23
Abstract
No abstract record available.
Inventors
- 👤 Timothy J Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:02
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/36; F16K17/38; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0777; Y10T137/1624; Y10T137/1797; Y10T137/1804; Y10T137/1819; Y10T137/7722; Y10T137/7723; Y10T137/7725; Y10T137/7731; Y10T137/8158; Y10T137/8326
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US89568A
Cited
US1055803A
Cited
US1405950A
Cited
US1609930A
Cited
US1742685A
Cited
US2229543A
Cited
US2228701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |