US2902507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating organosilicon compounds
Assignee: Dow Silicones Corp
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Filing: 1956-10-12
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Granted: 1959-09-01
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Expires: 1976-10-12
Abstract
No abstract record available.
Inventors
- 👤 James F Hyde
- 👤 Paul L Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:30
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A METHOD COMPRISING SEPARATING (1) SILICON COMPOUNDS HAVING TWO AND THREE SUBSTITUENTS OF THE GROUP CONSISTING OF ALKYL AND HALOGENATED ALKYL RADICALS OF LESS THAN 6 CARBON ATOMS, PER SILICON ATOM, THE REMAINING VALENCES OF THE SILICON BEING SATISFIED BY ATOMS OF THE GROUP CONSISTING OF CHLORINE AND OXYGEN AND IN (1) THERE BEING AT LEAST ONE ORGANIC RADICAL PER SILICON, FROM EACH OTHER AND FROM (2) SILICON COMPOUNDS OTHEN THAN (1) BY CONTACTING MIXTURES AND COPOLYMERS OF SAID SILICON COMPOUNDS WITH AN AQUEOUS SOLUTION OF HYDROCHLORIC ACID HAVING A CONCENTRATION OF AT LEAST 50% BY WEIGHT HCI BASED ON THE WEIGHT OF THE AQUEOUS SOLUTION UNTIL THE HYDROLYZABLE CHLORINE CONTENT OF THE ORGANOSILICON PRODUCT HAS REACHED THE DESIRED AMOUNT, SEPARATING THE AQUEOUS PHASE FROM THE ORGANOSILICON PHASE WITHOUT APPRECIABLY REDUCING THE CONCENTRATION OF THE ACID IN THE AQUEOUS PHASE DURING SEPARATION AND THEREAFTER SEPARATING THE ORGANOSILICON COMPONENTS OF THE REACTION.
Claim 2
Independent Claim
151 words
A METHOD COMPRISING SEPARATING (1) SILICON COMPOUNDS HAVING TWO AND THREE SUBSTITUENTS OF THE GROUP CONSISTING OF ALKYL AND HALOGENATED ALKYL RADICALS OF LESS THAN 6 CARBON ATOMS, PER SILICON ATOM, THE REMAINING VALENCES OF THE SILICON BEING SATISFIED BY ATOMS OF THE GROUP CONSISTING OF CHLORINE AND OXYGEN AND IN (1) THERE BEING AT LEAST ONE ORGANIC RADICAL PER SILICON, FROM EACH OTHER AND FROM (2) SILICON COMPOUNDS OTHEN THAN (1) BY CONTACTING MIXTURES AND COPOLYMERS OF SAID SILICON COMPOUNDS WITH AN AQUEOUS SOLUTION OF HYDROCHLORIC ACID HAVING A CONCENTRATION OF AT LEAST 50% BY WEIGHT HCI BASED ON THE WEIGHT OF THE AQUEOUS SOLUTION UNTIL THE HYDROLYZABLE CHLORINE CONTENT OF THE ORGANOSILICON PRODUCT HAS REACHED THE DESIRED AMOUNT, SEPARATING THE AQUEOUS PHASE FROM THE ORGANOSILICON PHASE WITHOUT APPRECIABLY REDUCING THE CONCENTRATION OF THE ACID IN THE AQUEOUS PHASE DURING SEPARATION AND THEREAFTER SEPARATING THE ORGANOSILICON COMPONENTS OF THE REACTION.
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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |