US2789784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas valve
Assignee: Penn Controls Inc
•
Filing: 1953-04-01
•
Granted: 1957-04-23
•
Expires: 1973-04-01
Abstract
No abstract record available.
Inventors
- 👤 Clifton A Cobb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:14
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)
US1072523A
Cited
US2013439A
Cited
US2238401A
Cited
US2461615A
Cited
US2496638A
Cited
US2622622A
Cited
US2509701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |