US2923520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hum-free solenoid mechanism
Assignee: General Controls Co
•
Filing: 1956-09-24
•
Granted: 1960-02-02
•
Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 William A Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:33
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/10; F16K31/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735047A
Cited
US1166699A
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US1552375A
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FR546817A
Cited
US1721995A
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US1926480A
Cited
US2291599A
Cited
US2388990A
Cited
US2622622A
Cited
US2810067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |