US3333776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophobic silica as a grinding aid
Assignee: Dow Silicones Corp
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Filing: 1965-04-05
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Granted: 1967-08-01
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Expires: 1985-04-05
Abstract
No abstract record available.
Inventors
- 👤 Lawrence A Rauner
- 👤 William J Maynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:38
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/30; B02; B02C; B02C17/00; B02C17/18; B02C17/20; B02C23/00; B02C23/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A PROCESS FOR PRODUCING FINELY-DIVIDED MATERIALS COMPRISING GRINDING IN A BALL-TYPE MILL A COMPOSITION CONSISTING ESSENTIALLY OF (A) 10 PARTS BY WEIGHT OF A PARTICULATE, NONMALLEABLE, BRITTLE, SOLID MATERIAL, (B) FROM 0.1 TO 2 PARTS OF A SILICA POWDER HAVING A SURFACE AREA OF AT LEAST 20 SQUARE METERS PER GRAM, THE SURFACE OF WHICH HAS BEEN RENDERED HYDROPHOBIC BY TREATMENT WITH AN ORGANOSILICON COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANO AND HALOORGANOSILAZANES, ORGANO AND HALOORGANOSILOXANES, AND HYDROXY-REACTIVE ORGANO AND HALOORAGANOSILANES, ALL CONTAINING NO MORE THAN 20 SI ATOMS PER MOLECULE, AND (C) FROM 5 TO 20 PARTS OF A VOLATILE, INERT LIQUID THAT IS NOT A SOLVENT FOR (A), WHERE THE COMBINATION OF (A), (B), AND (C) IS A FREE-FLOWING SLURRY THROUGHOUT SAID GRINDING PROCESS.
Claim 2
Dependent Claim
127 words
A PROCESS FOR PRODUCING FINELY-DIVIDED MATERIALS COMPRISING GRINDING IN A BALL-TYPE MILL A COMPOSITION CONSISTING ESSENTIALLY OF (A) 10 PARTS BY WEIGHT OF A PARTICULATE, NONMALLEABLE, BRITTLE, SOLID MATERIAL, (B) FROM 0.1 TO 2 PARTS OF A SILICA POWDER HAVING A SURFACE AREA OF AT LEAST 20 SQUARE METERS PER GRAM, THE SURFACE OF WHICH HAS BEEN RENDERED HYDROPHOBIC BY TREATMENT WITH AN ORGANOSILICON COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANO AND HALOORGANOSILAZANES, ORGANO AND HALOORGANOSILOXANES, AND HYDROXY-REACTIVE ORGANO AND HALOORAGANOSILANES, ALL CONTAINING NO MORE THAN 20 SI ATOMS PER MOLECULE, AND (C) FROM 5 TO 20 PARTS OF A VOLATILE, INERT LIQUID THAT IS NOT A SOLVENT FOR (A), WHERE THE COMBINATION OF (A), (B), AND (C) IS A FREE-FLOWING SLURRY THROUGHOUT SAID GRINDING PROCESS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |