US3600326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of hydrophobic silica and use thereof
Assignee: United States Department of the Army
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Filing: 1968-02-27
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Granted: 1971-08-17
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Expires: 1988-02-27
Abstract
Abstract A METHOD FOR PREPARING HYDROPHOBIC SILICA, THE STEPS COMPRISING MILLING A MIXTURE COMPRISING COLLOIDAL SILICA, INERT SOLVENT, AND SILICONE WITH SUBSEQUENT REMOVAL OF THE SAID SOLVENT. THE HYDROPHOBIC SILICA MAY BE COMBINED WITH MILLABLE SUBSTANCES GIVING USE TO A PRODUCT WITH HIGH DISPERSIBILITY.
Inventors
- 👤 James D Wilcox
- 👤 Joel M Klein
- 👤 Frederick A Hudon Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:20
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |