Patent US1875857A successfully refreshed from Google Patents.
US1875857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw valve gate
Assignee: Individual
•
Filing: 1931-05-16
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Granted: 1932-09-06
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Expires: 1951-05-16
Abstract
No abstract record available.
Inventors
- 👤 Francis C Cruff
- 👤 Albert A Giuste
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:58
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/53; Y; Y10; Y10T; Y10T137/00; Y10T137/7069; Y10T137/7256; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/554; Y10T70/5562; Y10T70/5566
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) | 1935-09-06 | 1936-03-07 | 1936-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-09-06 | 1940-03-07 | 1940-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-09-06 | 1944-03-07 | 1944-09-06 | $7700.00 | Window Closed / Lapsed |