US2331790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control valve
Assignee: Individual
•
Filing: 1941-02-25
•
Granted: 1943-10-12
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Expires: 1961-02-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Herbert L Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:56
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/06; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/8593; Y10T137/86493; Y10T137/86501; Y10T137/86831; Y10T137/86839; Y10T137/87048; Y10T137/87056; Y10T137/87072; Y10T74/00; Y10T74/20; Y10T74/20012
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) | 1946-10-11 | 1947-04-12 | 1947-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-11 | 1951-04-12 | 1951-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-11 | 1955-04-12 | 1955-10-12 | $7700.00 | Window Closed / Lapsed |