US2637304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve mechanism for reciprocating fluid motors
Assignee: Stewart Warner Corp
•
Filing: 1950-01-05
•
Granted: 1953-05-05
•
Expires: 1970-01-05
Abstract
No abstract record available.
Inventors
- 👤 Henry T Dinkelkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:35
CPC Classifications
F; F01; F01B; F01B11/00; F01B11/001; F01B17/00; F01B17/02; F01L; F01L23/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |