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US3456675A
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US
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Proportioning valve
Assignee: Sealed Unit Parts Co Inc
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Filing: 1966-12-27
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Granted: 1969-07-22
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Expires: 1986-12-27
Abstract
No abstract record available.
Inventors
- 👤 Henry Ehrens
- 👤 Sidney Weiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:02
CPC Classifications
F; F25; F25B; F25B45/00; F16; F16K; F16K51/00; F25B2345/00; F25B2345/006; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/313; Y10T137/8593; Y10T137/86493; Y10T137/86815
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |