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US3472791A
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US
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Method of spherical catalyst preparation
Assignee: Universal Oil Products Co
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Filing: 1966-09-12
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Granted: 1969-10-14
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Expires: 1986-09-12
Abstract
No abstract record available.
Inventors
- 👤 Kenneth D Vesely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:08
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1797804A
Cited
US2005412A
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US2381825A
Cited
US3210293A
Cited
US3312635A
Cited
US3342751A
Cited
US3346509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |