US2911995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve having alternative closing positions and a reversible, double faced valve element
Assignee: Individual
•
Filing: 1956-07-30
•
Granted: 1959-11-10
•
Expires: 1976-07-30
Abstract
No abstract record available.
Inventors
- 👤 Preising Richard William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:34
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/44; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6161; Y10T137/6164; Y10T137/6167; Y10T137/8593; Y10T137/86493; Y10T137/86879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US392539A
Cited
US594895A
Cited
US623418A
Cited
US2704650A
Cited
GB189414499A
Cited
US695016A
Cited
FR469308A
Cited
GB215259A
Cited
US1882433A
Cited
US1963685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |