US2985193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control valves
Assignee: CLACK WATER TREAT Inc
•
Filing: 1957-04-29
•
Granted: 1961-05-23
•
Expires: 1977-04-29
Abstract
No abstract record available.
Inventors
- 👤 Willis E Clack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:27
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/48; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86928; Y10T137/87016; Y10T137/8704; Y10T137/877; Y10T137/87708; Y10T137/87748; Y10T137/87756
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1066213A
Cited
US2396809A
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US2703105A
Cited
US2717003A
Cited
US2699207A
Cited
US2711757A
Cited
US2715098A
Cited
US2808882A
Cited
US2796177A
Cited
US2935092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |