US2991793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level control
Assignee: Aquamatic Inc
•
Filing: 1959-03-26
•
Granted: 1961-07-11
•
Expires: 1979-03-26
Abstract
No abstract record available.
Inventors
- 👤 Robert A Whitlock
- 👤 Curtis C Jouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:32
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/001; Y; Y10; Y10T; Y10T137/00; Y10T137/1624
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1286485A
Cited
US2034370A
Cited
US1993666A
Cited
US2716422A
Cited
US2768027A
Cited
US2827915A
Cited
US2935196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |