Patent US3349048A successfully refreshed from Google Patents.
US3349048A
Expired / Lapsed
US
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Method for making linear polydiarylsiloxanes
Assignee: General Electric Co
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Filing: 1965-11-17
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Granted: 1967-10-24
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Expires: 1985-11-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard A Vaughn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:32
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
105 words
A METHOD FOR MAKING LINEAR DIARYLPOLYSILOXANE COMPOSED OF AT LEAST FIVE CHEMICALLY COMBINED DIARYLSILOXY UNITS COMPRISING (1) FORMING A PASTE CONSISTING ESSENTIALLY OF A SUBSTANTIALLY INERT ORGANIC SOLVENT, A DIARYLSILANE DIO, AND A METAL SALT OF A FATTY ACID UTILIZED IN SAID PASTE IN AN AMOUNT SUFFICIENT TO PROVIDE FOR A PROPORATION OF FROM 0.01 PERCENT TO 3 PERCENT BY WEIGHT OF METAL, BASED ON THE WEIGHT OF SAID DIARYLSILANE DIOL, (2) EFFECTING THE REMOVAL OF SAID SUBSTANTIALLY INERT ORGANIC SOLVENT FROM SAID PASTE, (3) HEATING THE RESULTING PRODUCT OF (2) TO A TEMPERATURE BETWEEN 20*C. AND 225*C. AND (4) RECOVERING LINEAR POLYDIARYLSILOXANE FROM (3).
Claim 2
Independent Claim
105 words
A METHOD FOR MAKING LINEAR DIARYLPOLYSILOXANE COMPOSED OF AT LEAST FIVE CHEMICALLY COMBINED DIARYLSILOXY UNITS COMPRISING (1) FORMING A PASTE CONSISTING ESSENTIALLY OF A SUBSTANTIALLY INERT ORGANIC SOLVENT, A DIARYLSILANE DIO, AND A METAL SALT OF A FATTY ACID UTILIZED IN SAID PASTE IN AN AMOUNT SUFFICIENT TO PROVIDE FOR A PROPORATION OF FROM 0.01 PERCENT TO 3 PERCENT BY WEIGHT OF METAL, BASED ON THE WEIGHT OF SAID DIARYLSILANE DIOL, (2) EFFECTING THE REMOVAL OF SAID SUBSTANTIALLY INERT ORGANIC SOLVENT FROM SAID PASTE, (3) HEATING THE RESULTING PRODUCT OF (2) TO A TEMPERATURE BETWEEN 20*C. AND 225*C. AND (4) RECOVERING LINEAR POLYDIARYLSILOXANE FROM (3).
Claim 3
Dependent Claim
16 words
THE METHOD OF CLAIM 1 WHERE SAID METAL SALT OF A FATTY ACID IS STANNOUS OCTOATE.
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |