US2681787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seating mechanism for rotatable plug valves
Assignee: Crane Co
•
Filing: 1950-02-14
•
Granted: 1954-06-22
•
Expires: 1970-02-14
Abstract
No abstract record available.
Inventors
- 👤 Carl A Dopp
- 👤 Edward G Schmidt
- 👤 Craene Edmond P De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:18
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE194642C
Cited
US491469A
Cited
FR561065A
Cited
US1826330A
Cited
US2296650A
Cited
US2309304A
Cited
US2594141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |