Patent CA603517A successfully refreshed from Google Patents.
US1964616A
Expired / Lapsed
US
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Pressure control valve
Assignee: Service Station Equipment Co
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Filing: 1932-05-20
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Granted: 1934-06-26
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Expires: 1952-05-20
Abstract
No abstract record available.
Inventors
- 👤 David S Willson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:45
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/32; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/3028; Y10T137/3084; Y10T137/309; Y10T137/3099; Y10T137/7722; Y10T137/7738; Y10T137/7771; Y10T137/7772; Y10T137/7774; Y10T137/7777; Y10T137/7781
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-06-25 | 1937-12-25 | 1938-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-06-25 | 1941-12-25 | 1942-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-06-25 | 1945-12-25 | 1946-06-26 | $7700.00 | Window Closed / Lapsed |