Patent US2919590A successfully refreshed from Google Patents.
US2919590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot valve actuator construction
Assignee: Individual
•
Filing: 1954-03-29
•
Granted: 1960-01-05
•
Expires: 1974-03-29
Abstract
No abstract record available.
Inventors
- 👤 David E Griswold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:44
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/16; F16K31/165; G; G05; G05D; G05D16/00; G05D16/14; G05D16/16; G05D16/163; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/1892; Y10T74/18936
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1302251A
Cited
US1517728A
Cited
US1525462A
Cited
US2126863A
Cited
DE703164C
Cited
US2474355A
Cited
US2421325A
Cited
US2447408A
Cited
US2543846A
Cited
US2683992A
Cited
US2663459A
Cited
US2633868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |