US2628633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety valve
Assignee: ACF Industries Inc
•
Filing: 1947-08-09
•
Granted: 1953-02-17
•
Expires: 1967-08-09
Abstract
No abstract record available.
Inventors
- 👤 Clyde H Folmsbee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:10
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/46; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7738
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US150536A
Cited
US151027A
Cited
US432140A
Cited
US763208A
Cited
GB190412911A
Cited
US1725297A
Cited
US2072271A
Cited
US2110481A
Cited
US2479737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |