US3477946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption process
Assignee: Universal Oil Products Co
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Filing: 1967-12-28
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Granted: 1969-11-11
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Expires: 1987-12-28
Abstract
No abstract record available.
Inventors
- 👤 William B Borst Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:05
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1418; B01D53/1406; B01D53/1487; C; C10; C10G; C10G21/00
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) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |