US3490879A
Expired / Lapsed
US
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Fluid-solid contacting apparatus utilizing plural rotor members containing contact masses
Assignee: Universal Oil Products Co
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Filing: 1966-08-30
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Granted: 1970-01-20
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Expires: 1986-08-30
Abstract
No abstract record available.
Inventors
- 👤 Peter Urban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:22
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/06; B01D53/04; B01D53/0407; B01D53/047; B01D2253/00; B01D2253/10; B01D2253/102; B01D2253/104; B01D2253/106; B01D2253/108; B01D2253/116; B01D2253/25; B01D2253/30; B01D2253/302; B01D2253/308; B01D2255/00; B01D2255/10; B01D2255/102; B01D2255/1021; B01D2255/20; B01D2255/207; B01D2255/20753; B01D2255/209; B01D2255/2092; B01D2255/30; B01D2256/00; B01D2256/10; B01D2256/12; B01D2256/16; B01D2256/24; B01D2256/245; B01D2257/00; B01D2257/30; B01D2257/302; B01D2257/304; B01D2257/306; B01D2257/70; B01D2257/702; B01D2257/80; B01D2259/00; B01D2259/40; B01D2259/40003; B01D2259/40005; B01D2259/40011; B01D2259/40043; B01D2259/4005; B01D2259/40056; B01D2259/40077; B01D2259/40081; B01D53/26; B01D53/261
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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |