US3334062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for rendering inorganic powders hydrophobic
Assignee: Dow Silicones Corp
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Filing: 1965-03-01
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Granted: 1967-08-01
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Expires: 1985-03-01
Abstract
No abstract record available.
Inventors
- 👤 Eric D Brown
- 👤 Hyde James Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:09
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3081; C01; C01G; C01G5/00; C03; C03C; C03C17/00; C03C17/28; C03C17/30; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/08; C08K; C08K9/00; C08K9/04; C08K9/06; C09C1/309; C09C3/00; C09C3/006; C09C3/08; C09C3/12; C01P; C01P2004/00; C01P2004/80
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
THE PROCESS COMPRISING CONTACTING AT A TEMPERATURE OF 15* TO 170*C. (A) A FINELY-DIVIDED, NONHYDROPHOBIC, INORGANIC MATERIAL CONTAINING AT LEAST Y/220 WEIGHT PERCENT OF ADSORBED WATER, BASED ON THE WEIGHT OF (A), WITH (B) AT LEAST Y/50 WEIGHT PERCENT, BASED ON THE WEIGHT OF (A), OF A CYCLIC SILOXANE OF THE FORMULA (R2SIO)3, IN THE PRESENCE OF (C) AT LEAST 0.2 MOL PERCENT, BASED ONTHE MOLES OF (A) PRESENT, OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF AMMONIUM HYDROXIDE, AMMONIUM CARBONATE, NH4X,
Claim 2
Dependent Claim
83 words
THE PROCESS COMPRISING CONTACTING AT A TEMPERATURE OF 15* TO 170*C. (A) A FINELY-DIVIDED, NONHYDROPHOBIC, INORGANIC MATERIAL CONTAINING AT LEAST Y/220 WEIGHT PERCENT OF ADSORBED WATER, BASED ON THE WEIGHT OF (A), WITH (B) AT LEAST Y/50 WEIGHT PERCENT, BASED ON THE WEIGHT OF (A), OF A CYCLIC SILOXANE OF THE FORMULA (R2SIO)3, IN THE PRESENCE OF (C) AT LEAST 0.2 MOL PERCENT, BASED ONTHE MOLES OF (A) PRESENT, OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF AMMONIUM HYDROXIDE, AMMONIUM CARBONATE, NH4X,
Claim 3
Dependent Claim
23 words
THE PROCESS OF CLAIM 1 WHERE (A) CONSISTS ESSENTIALLY OF SILICA HAVING A SURFACE AREA OF AT LEAST 100 SQUARE METERS PER GRAM.
Claim 4
Dependent Claim
16 words
A SILICONE ELASTOMER CONTAINING AS A FILLER THE PRODUCT MADE BY THE PROCESS OF CLAIM 2.
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 |