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Patent US3275546A successfully refreshed from Google Patents.
US3275546A
Expired / Lapsed
US
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Method of attriting solids in a hydrocracking process
Assignee: Consolidation Coal Co
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Filing: 1962-12-28
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Granted: 1966-09-27
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Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
- 👤 William B Retallick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:07
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/08; C10G1/06; C10G47/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2651600A
Cited
US2891000A
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US2832545A
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US2962434A
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US2987465A
Cited
US3050459A
Cited
US3018241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |