US2506872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve mechanism
Assignee: Individual
•
Filing: 1945-06-19
•
Granted: 1950-05-09
•
Expires: 1965-06-19
Abstract
No abstract record available.
Inventors
- 👤 Charles K Huthsing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:13
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/30; F16K1/304; F16K1/305; A; A62; A62C; A62C99/00; A62C99/0009; A62C99/0018; A62C99/0027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US583467A
Cited
US964468A
Cited
US1609340A
Cited
US1934314A
Cited
US2047750A
Cited
US1975178A
Cited
FR786524A
Cited
US2239169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |