US2669253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined shutoff and relief valve
Assignee: Crane Co
•
Filing: 1951-06-21
•
Granted: 1954-02-16
•
Expires: 1971-06-21
Abstract
No abstract record available.
Inventors
- 👤 George E Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:32
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US255914A
Cited
US2247363A
Cited
US2343584A
Cited
US2328902A
Cited
US2310628A
Cited
US2598122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |