Patent US2542908A successfully refreshed from Google Patents.
Patent US2947510A successfully refreshed from Google Patents.
US2947510A
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Solenoid operated gas valve with solenoid retarding means
Assignee: General Controls Co
•
Filing: 1957-09-09
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Granted: 1960-08-02
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Expires: 1977-09-09
Abstract
No abstract record available.
Inventors
- 👤 William A Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:33
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/005; F23N2235/00; F23N2235/12; F23N2235/14
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |