US3478960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating-cooling vortex control valve
Assignee: POWER REGULATOR CO
•
Filing: 1968-06-10
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Granted: 1969-11-18
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Expires: 1988-06-10
Abstract
No abstract record available.
Inventors
- 👤 Wesley L Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:30
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/70; F24F11/80; F24F11/83; F24F11/84; G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; G05D23/125; G05D23/126; G05D23/127; G05D23/128; F24F11/30; F24F2110/00; F24F2110/10; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2065; Y10T137/2071
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2558937A
Cited
US2556479A
Cited
US2495226A
Cited
US3159208A
Cited
US3324891A
Cited
US3171421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |