US1647734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cleaning valve
Assignee: FRANK H T POTTER
•
Filing: 1925-05-14
•
Granted: 1927-11-01
•
Expires: 1945-05-14
Abstract
No abstract record available.
Inventors
- 👤 George M Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:36
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/16; F16K3/18; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/4336
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1930-10-31 | 1931-05-02 | 1931-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-10-31 | 1935-05-02 | 1935-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-10-31 | 1939-05-02 | 1939-11-01 | $7700.00 | Window Closed / Lapsed |