US2647501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve assembly
Assignee: Rich Manuf Corp
•
Filing: 1947-09-22
•
Granted: 1953-08-04
•
Expires: 1967-09-22
Abstract
No abstract record available.
Inventors
- 👤 Dora M Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:18
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US923422A
Cited
US1160028A
Cited
US1213590A
Cited
US1539167A
Cited
US1462160A
Cited
US2165238A
Cited
US2165239A
Cited
US2346525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |