Patent US2909549A successfully refreshed from Google Patents.
US2909549A
Expired / Lapsed
US
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Alkoxy-endblocked silicone polymers
Assignee: Union Carbide Corp
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Filing: 1953-12-14
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Granted: 1959-10-20
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Expires: 1973-12-14
Abstract
No abstract record available.
Inventors
- 👤 Donald L Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:41
CPC Classifications
C; C08; C08G; C08G77/00; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C07F7/1872; C07F7/1884; C08G77/04; C08G77/045; C08G77/14; C08G77/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
65 words
PROCESS FOR MAKING ALKOXY SILICON COMPOUNDS WHICH COMPRISES REACTING UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AND IN THE PRESENCE OF AN ALKALINE CATALYST A SILICONOXY-SILICON BOND WITH A SILICON-OXY-CARBON BOND IN WHICH THE BONDED CARBON ATOMS IS PART OF AN ALKYL RADICAL AND IN WHICH THE OXYBONDED SILICON ATOM OF THE SILICON-OXYCARBON BOND IS ALSO BONDED DIRECTLY TO CARBON TO EFFECT AN EXCHANGE OF THE ALKYL RADICAL.
Claim 2
Dependent Claim
65 words
PROCESS FOR MAKING ALKOXY SILICON COMPOUNDS WHICH COMPRISES REACTING UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AND IN THE PRESENCE OF AN ALKALINE CATALYST A SILICONOXY-SILICON BOND WITH A SILICON-OXY-CARBON BOND IN WHICH THE BONDED CARBON ATOMS IS PART OF AN ALKYL RADICAL AND IN WHICH THE OXYBONDED SILICON ATOM OF THE SILICON-OXYCARBON BOND IS ALSO BONDED DIRECTLY TO CARBON TO EFFECT AN EXCHANGE OF THE ALKYL RADICAL.
Claim 3
Dependent Claim
104 words
A POLYALKOXPOLYSILOXANE COMPRISING A GROUP FROM THE CLASS CONSISTING OF R-SI$AND $SI-R''-SI$ WHEREIN R IS A MONOVALENT HYDROCARBON RADICAL AND R'' IS A DIVALENT HYDROCABON RADICAL, HAVING FROM 2 TO 6 SILOXANE CHAINS COMPOSED OF AT LEAST ONE UNIT OF THE FORMULA R2SIO WHERE R IS AS DEFINED ABOVE EACH OF SAID CHAINS BEING CONNECTED AT ONE END THEREOF TO THE SILICON OF SAID GROUP THROUGH SILICON TO OXYGEN TO SILICON LINKAGE, EACH OF SAID CHAINS BEING TERMINATED AT THE OTHER END THEREOF BY AN ALKOXY RADICAL AND EACH REMAINING UNFILLED VALENCE OF THE SILICON OF SAID GROUP BEING SATISFIED BY AN ALKOXY RADICAL.
Claim 4
Dependent Claim
104 words
A POLYALKOXPOLYSILOXANE COMPRISING A GROUP FROM THE CLASS CONSISTING OF R-SI$AND $SI-R''-SI$ WHEREIN R IS A MONOVALENT HYDROCARBON RADICAL AND R'' IS A DIVALENT HYDROCABON RADICAL, HAVING FROM 2 TO 6 SILOXANE CHAINS COMPOSED OF AT LEAST ONE UNIT OF THE FORMULA R2SIO WHERE R IS AS DEFINED ABOVE EACH OF SAID CHAINS BEING CONNECTED AT ONE END THEREOF TO THE SILICON OF SAID GROUP THROUGH SILICON TO OXYGEN TO SILICON LINKAGE, EACH OF SAID CHAINS BEING TERMINATED AT THE OTHER END THEREOF BY AN ALKOXY RADICAL AND EACH REMAINING UNFILLED VALENCE OF THE SILICON OF SAID GROUP BEING SATISFIED BY AN ALKOXY RADICAL.
References Cited (Backward Citations)
US2574265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |