US2927937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alkyl orthosilicates by attrition milling
Assignee: Union Carbide Corp
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Filing: 1955-04-26
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Granted: 1960-03-08
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Expires: 1975-04-26
Abstract
No abstract record available.
Inventors
- 👤 John M Gaines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:03
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD OF PRODUCING ALKYL ORTHOSILICATES, WHICH COMPRISES REACTING UNDER ANHYDROUS CONDITIONS, EQUAL AMOUNTS OF SILICON AND OF AN ALIPHATIC ALCOHOL, TOGETHER WITH FROM 5 PERCENT TO 15 PERCENT BY WEIGHT OF SAID ALCOHOL OF AT LEAST ONE ALKALINE CATALYST SELECTED FROM THE GROUP CONSISTING OF SODIUM ETHOXIDE, POTASSIUM HYDROXIDE, AMMONIUM BIFLUORIDE, AMMONIA, AND DICYANDIAMIDE, MAINTAINING THE REACTION TEMPERATURE ABOVE ROOM TEMPERATURE, BUT BELOW THE CRITICAL TEMPERATURE OF SAID ALCOHOL, SSUCH THAT A LIQUID PHASE BE PRESENT, AND MAINTAINING ACTIVE THE SURFACE OF SAID SILICON BY SUBJECTING THE SAME TO ATTRITION MILLING.
Claim 2
Independent Claim
92 words
A METHOD OF PRODUCING ALKYL ORTHOSILICATES, WHICH COMPRISES REACTING UNDER ANHYDROUS CONDITIONS, EQUAL AMOUNTS OF SILICON AND OF AN ALIPHATIC ALCOHOL, TOGETHER WITH FROM 5 PERCENT TO 15 PERCENT BY WEIGHT OF SAID ALCOHOL OF AT LEAST ONE ALKALINE CATALYST SELECTED FROM THE GROUP CONSISTING OF SODIUM ETHOXIDE, POTASSIUM HYDROXIDE, AMMONIUM BIFLUORIDE, AMMONIA, AND DICYANDIAMIDE, MAINTAINING THE REACTION TEMPERATURE ABOVE ROOM TEMPERATURE, BUT BELOW THE CRITICAL TEMPERATURE OF SAID ALCOHOL, SSUCH THAT A LIQUID PHASE BE PRESENT, AND MAINTAINING ACTIVE THE SURFACE OF SAID SILICON BY SUBJECTING THE SAME TO ATTRITION MILLING.
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) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |