Patent US2001271A successfully refreshed from Google Patents.
US2001271A
Expired / Lapsed
US
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Gate valve
Assignee: Individual
•
Filing: 1930-12-03
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Granted: 1935-05-14
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Expires: 1950-12-03
Abstract
No abstract record available.
Inventors
- 👤 Walter G E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:15
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/30; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4259; 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) | 1938-05-13 | 1938-11-12 | 1939-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-13 | 1942-11-12 | 1943-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-13 | 1946-11-12 | 1947-05-14 | $7700.00 | Window Closed / Lapsed |