Patent US2931374A successfully refreshed from Google Patents.
US2931374A
Expired / Lapsed
US
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Speed-responsive valve mechanism
Assignee: Individual
•
Filing: 1957-04-22
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Granted: 1960-04-05
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Expires: 1977-04-22
Abstract
No abstract record available.
Inventors
- 👤 Glenn T Randol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:51
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/72; B60T8/74; F; F16; F16K; F16K31/00; G; G05; G05D; G05D13/00; G05D13/08; G05D13/10; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/108; Y10T137/1098
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2650815A
Cited
US2762384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |