US2875159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bead forming process
Assignee: Sinclair Refining Co
•
Filing: 1953-06-02
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Granted: 1959-02-24
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Expires: 1973-06-02
Abstract
No abstract record available.
Inventors
- 👤 Erickson Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:11
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12; B01J21/14; B01J37/00; Y; Y10; Y10S; Y10S502/00; Y10S502/506; Y10S502/513
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE METHOD OF PREPARING BEAD FROM SILICA GEL BASE CRACKING CATALYST SELECTED FROM THE GROUP CONSISTING OF SILICA ALUMINA AND SILICA MAGNESIA FOR DRYING WHICH COMPRISES TREATING THE BED FROM HYDROGEL WITH AN AQUEOUS SOLUTION OF 0.1 TO 0.5 WEIGHT PERCENT OF A DIAMYL PHENOL ETHOXY POLYMER BASED ON TOTAL WATER CONTENT.
Claim 2
Independent Claim
52 words
THE METHOD OF PREPARING BEAD FROM SILICA GEL BASE CRACKING CATALYST SELECTED FROM THE GROUP CONSISTING OF SILICA ALUMINA AND SILICA MAGNESIA FOR DRYING WHICH COMPRISES TREATING THE BED FROM HYDROGEL WITH AN AQUEOUS SOLUTION OF 0.1 TO 0.5 WEIGHT PERCENT OF A DIAMYL PHENOL ETHOXY POLYMER BASED ON TOTAL WATER CONTENT.
References Cited (Backward Citations)
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Cited
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US2490260A
Cited
US2532497A
Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |