US3180754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing hydrophobic and/or organophilic siliceous materials
Assignee: WR Grace and Co
•
Filing: 1962-01-31
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Granted: 1965-04-27
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Expires: 1982-01-31
Abstract
No abstract record available.
Inventors
- 👤 Ellsworth G Acker
- 👤 Moises G Sanchez
- 👤 David E Kramm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:13
CPC Classifications
B; B82; B82Y; B82Y30/00; C; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3063; C09C1/40; C09C1/42; C09C3/00; C09C3/08; C01; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/60; C01P2004/64; C01P2004/80; C01P2006/00; C01P2006/10; C01P2006/12; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A PROCESS FOR TREATING SILICEOUS INORGANIC SUBSTRATE MATERIALS SELECTED FROM THE GROUP CONSISTING OF FINE SIZED SILICAS AND CLAYS IN THE COLLODIAL AND SUPERCOLLOIDAL STATE OF SUBDIVISION, HAVING A SURFACE AREA OF 1 TO 900 SQUARE METERS PER GRAM TO RENDER SAID MATERIALS HYDROPHOBIC WHICH COMPRISES: (A) HEATING SAID MATERIAL WITH AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF BUTYRALDEHYDE, VALERALDDEHYDE, AND HEPTALDEHYDE, (B) IN THE WEIGHT PROPORTIONS OF ALDEHYDE TO SILICA OF 11 TO 1 TO 6 TO 1, TO A TEMPERATURE OF 125*C. TO 250*C. AND AT A PRESSURE OF 35 TO 200 P.S.I.G., FOR A PERIOD OF ABOUT 4 HOURS, (C) FOLLOWED BY DEGASSING AT A TEMPERATURE OF 150*C. TO 250*C. UNDER VACUUM, (D) AND RECOVERING THE PRODUCT HYDROPHOBIC MATERIAL.
Claim 2
Dependent Claim
123 words
A PROCESS FOR TREATING SILICEOUS INORGANIC SUBSTRATE MATERIALS SELECTED FROM THE GROUP CONSISTING OF FINE SIZED SILICAS AND CLAYS IN THE COLLODIAL AND SUPERCOLLOIDAL STATE OF SUBDIVISION, HAVING A SURFACE AREA OF 1 TO 900 SQUARE METERS PER GRAM TO RENDER SAID MATERIALS HYDROPHOBIC WHICH COMPRISES: (A) HEATING SAID MATERIAL WITH AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF BUTYRALDEHYDE, VALERALDDEHYDE, AND HEPTALDEHYDE, (B) IN THE WEIGHT PROPORTIONS OF ALDEHYDE TO SILICA OF 11 TO 1 TO 6 TO 1, TO A TEMPERATURE OF 125*C. TO 250*C. AND AT A PRESSURE OF 35 TO 200 P.S.I.G., FOR A PERIOD OF ABOUT 4 HOURS, (C) FOLLOWED BY DEGASSING AT A TEMPERATURE OF 150*C. TO 250*C. UNDER VACUUM, (D) AND RECOVERING THE PRODUCT HYDROPHOBIC MATERIAL.
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) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |