US2608205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic safety valve closure system
Assignee: Individual
•
Filing: 1946-03-21
•
Granted: 1952-08-26
•
Expires: 1966-03-21
Abstract
No abstract record available.
Inventors
- 👤 Ralph R Proctor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:22
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/1022; F17; F17D; F17D5/00; F17D5/02; F17D5/04; F16L2101/00; F16L2101/30; Y; Y10; Y10T; Y10T137/00; Y10T137/5762; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2224844A
Cited
US2280140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |