US3525684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst and process for hydrorefining petroleum crude and residual oils
Assignee: Universal Oil Products Co
•
Filing: 1968-11-13
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Granted: 1970-08-25
•
Expires: 1988-11-13
Abstract
No abstract record available.
Inventors
- 👤 Mark J O'hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:30
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/188; C; C10; C10G; C10G2300/00; C10G2300/10; C10G2300/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3125507A
Cited
US3262874A
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US3271302A
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US3294659A
Cited
US3453219A
Cited
US3471399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |