US2811169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level control valve
Assignee: Individual
•
Filing: 1956-04-19
•
Granted: 1957-10-29
•
Expires: 1976-04-19
Abstract
No abstract record available.
Inventors
- 👤 Avery D Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:28
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/30; E03D1/32; F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/34; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7374; Y10T137/7439; Y10T137/7446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2371830A
Cited
US2761466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |