Patent US1854726A successfully refreshed from Google Patents.
Patent US2000367A successfully refreshed from Google Patents.
US2000367A
Expired / Lapsed
US
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Automatic valve control system
Assignee: Individual
•
Filing: 1933-07-03
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Granted: 1935-05-07
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Expires: 1953-07-03
Abstract
No abstract record available.
Inventors
- 👤 Colonel J Williamson
- 👤 Herbert F Suverkru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:15
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/16; A01G25/162; Y; Y10; Y10S; Y10S239/00; Y10S239/15; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86421; Y10T137/86429
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) | 1938-05-06 | 1938-11-05 | 1939-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-06 | 1942-11-05 | 1943-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-06 | 1946-11-05 | 1947-05-07 | $7700.00 | Window Closed / Lapsed |