US2659565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder valve
Assignee: Weatherhead Co
•
Filing: 1950-10-05
•
Granted: 1953-11-17
•
Expires: 1970-10-05
Abstract
No abstract record available.
Inventors
- 👤 Andrew G Johnson
- 👤 Clair Theodore A St
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:36
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE19151E
Cited
GB190210404A
Cited
US1385058A
Cited
US2197455A
Cited
US2216292A
Cited
US2400861A
Cited
GB596533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |