US2528898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot indicator for solenoid valves
Assignee: Alco Valve Co
•
Filing: 1946-02-02
•
Granted: 1950-11-07
•
Expires: 1966-02-02
Abstract
No abstract record available.
Inventors
- 👤 Douglas K Mcilvaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:51
CPC Classifications
F; F16; F16K; F16K37/00; F16K37/0025; F16K37/0041; H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F2007/1684; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8242
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US788278A
Cited
US1622862A
Cited
US1962795A
Cited
US2161960A
Cited
US2251441A
Cited
US2197320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |