Patent EP0165566A2 successfully refreshed from Google Patents.
US3531397A
Expired / Lapsed
US
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Method of catalyst preparation
Assignee: Universal Oil Products Co
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Filing: 1967-12-11
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Granted: 1970-09-29
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Expires: 1987-12-11
Abstract
No abstract record available.
Inventors
- 👤 Edward Michalko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:51
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B01J2229/00; B01J2229/30; B01J2229/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3352796A
Cited
US3344086A
Cited
US3329628A
Cited
US3425956A
Cited
US3140253A
Cited
US3410808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |