US2875780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking reversing valve
Assignee: Individual
•
Filing: 1953-09-28
•
Granted: 1959-03-03
•
Expires: 1973-09-28
Abstract
No abstract record available.
Inventors
- 👤 Frank J Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:27
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0675; F16K31/0679; F16K31/0603; F16K31/0606; F16K31/0624; F16K31/0627; F25; F25B; F25B13/00; F25B41/00; F25B41/20; F25B41/26; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/5987; Y10T137/8593; Y10T137/87265; Y10T137/87338; Y10T137/87507
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US322388A
Cited
US1235980A
Cited
US1640537A
Cited
US2366412A
Cited
US2654227A
Cited
US2634086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |