US2595339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cogelation of silica and alumina sols at ph 3.5-6.5
Assignee: Standard Oil Co
•
Filing: 1948-12-29
•
Granted: 1952-05-06
•
Expires: 1968-12-29
Abstract
No abstract record available.
Inventors
- 👤 Herder Marvin Den
- 👤 Heard Llewellyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:52
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
THE METHOD OF PREPARING AN IMPROVED SILICAALUMINA CATALYST WHICH COMPRISES MIXING AN ALUMINA HYDROSOL HAVING A PH BETWEEN 3.5 AND 6.5 INTO A SILICA HYDROSOL HAVING A PH BETWEEN 3.5 AND 6.5, ALLOWING THE MIXTURE TO SET A TRANSPARENT, VIBRANT ULTRAGEL, WASHING SAID ULTRAGEL
Claim 2
Independent Claim
44 words
THE METHOD OF PREPARING AN IMPROVED SILICAALUMINA CATALYST WHICH COMPRISES MIXING AN ALUMINA HYDROSOL HAVING A PH BETWEEN 3.5 AND 6.5 INTO A SILICA HYDROSOL HAVING A PH BETWEEN 3.5 AND 6.5, ALLOWING THE MIXTURE TO SET A TRANSPARENT, VIBRANT ULTRAGEL, WASHING SAID ULTRAGEL
References Cited (Backward Citations)
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Cited
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Cited
US2276314A
Cited
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Cited
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Cited
US2477373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |