US2615672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for axially movable rotary plug valves
Assignee: TRI CLOVER MACHINE CO
•
Filing: 1948-11-19
•
Granted: 1952-10-28
•
Expires: 1968-11-19
Abstract
No abstract record available.
Inventors
- 👤 Hinrichs Ferdinand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:06
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/16; F16K5/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1661432A
Cited
US1923295A
Cited
US1892835A
Cited
US1933903A
Cited
US2187477A
Cited
US2387013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |