US2925986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure operated valve
Assignee: Standard Thomson Corp
•
Filing: 1954-03-31
•
Granted: 1960-02-23
•
Expires: 1974-03-31
Abstract
No abstract record available.
Inventors
- 👤 John E Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:13
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/1925; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49877; Y10T29/49908; Y10T29/49915; Y10T29/49917; Y10T29/49918
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1176727A
Cited
FR702868A
Cited
US2101735A
Cited
US2046578A
Cited
US2208149A
Cited
GB531280A
Cited
US2453851A
Cited
US2534497A
Cited
US2673038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |