US2741600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing colloidal silica aquasols
Assignee: Monsanto Chemicals Ltd
•
Filing: 1949-01-27
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Granted: 1956-04-10
•
Expires: 1969-01-27
Abstract
No abstract record available.
Inventors
- 👤 Lyman S Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:53
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/146; C01B33/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PROCESS OF PREPARING STABLE SILICA AQUASOLS CONTAINING DISPERSED COLLOIDAL SILICA PARTICLES WHICH COMPRISES SUBJECTING A THIXOTROPIC AGGLOMERATE OF COLLOIDAL SILICA AND WATER TO SHEAR FORCE OF SUFFICIENT INTENSITY TO DISPERSE SAID THIXOTROPIC AGGLOMERATE TO A STABLE COLLOIDAL SOLUTION.
Claim 2
Dependent Claim
39 words
A PROCESS OF PREPARING STABLE SILICA AQUASOLS CONTAINING DISPERSED COLLOIDAL SILICA PARTICLES WHICH COMPRISES SUBJECTING A THIXOTROPIC AGGLOMERATE OF COLLOIDAL SILICA AND WATER TO SHEAR FORCE OF SUFFICIENT INTENSITY TO DISPERSE SAID THIXOTROPIC AGGLOMERATE TO A STABLE COLLOIDAL SOLUTION.
References Cited (Backward Citations)
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US2375738A
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US2466842A
Cited
US2457971A
Cited
US2544363A
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US2572578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |