Patent US3422848A successfully refreshed from Google Patents.
US3422848A
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US
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Multiport rotary disc valve with liner protection means
Assignee: Universal Oil Products Co
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Filing: 1966-06-09
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Granted: 1969-01-21
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Expires: 1986-06-09
Abstract
No abstract record available.
Inventors
- 👤 Warren S Liebman
- 👤 Don B Carson
- 👤 Charles A Dolejs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:27
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/072; F16K11/074; F16K11/0743; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86509; Y10T137/86517; Y10T137/86533; Y10T137/86863
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) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |