Patent US2958707A successfully refreshed from Google Patents.
US2958707A
Expired / Lapsed
US
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Diorganopolysiloxane-halogenated olefin graft copolymers
Assignee: Dow Silicones Corp
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Filing: 1955-05-02
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Granted: 1960-11-01
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Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Earl L Warrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:56
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08F; C08F283/00; C08F283/12; C08F285/00; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A GRAFT COPOLYMER WHICH IS TE REACITON PRODUCT FORMED BY THE PROCESS WHICH COMPRISES HEATING A MIXTURE OF (1) AN ORGANOPOLYSILOXANE CONSISTING ESSENTIALLY OF DIORGANOSILOXANE UNITS IN WHICH THE ORGANIC RADICALS ARE SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS OF LESS THAN 5 CARBON ATOMS AND PHENYL RADICALS, THERE BEING AT LEAST ONE OF SAID ALKYL RADICALS PER MOLECULE AND SAID ORGANOPOLYSILOXANE BEING ESSENTIALLY FREE OF SILICONBONDED HYDROGEN AND ESSENTIALLY FREE OF ORGANIC RADICALS HAVING ALIPHATIC UNSATURATION THEREIN, (2) A HALOGENATED OLEFIN, AND (3) A FREE RADICAL GENERATOR OF THE GROUP CONSISTING OF ORGANIC PEROXIDES AND AZO COMPOUNDS IN WHICH BOTH THE N ATOMS OF THE AZO LINKAGE ARE ATTACHED TO A TERTIARY CARBON ATOM AND THE REMAINING VALENCES OF SAID TERITARY CARBON ATOMS ARE SATIFIED BY RADICALS OF THE GROUP CONSISTING OF NITRILE RADICALS, CARBOXYALKYL RADICALS, CYCLOALKYLENE RADICALS, ALKYL RADICALS AND RADICALS OF THE FORMULA YOOC- IN WHICH Y IS AN ALKYL RADICAL, AT A TEMPERATURE ABOVE THAT AT WHICH THE FREE RADICAL GENERATOR FORMS FREE RADICALS.
Claim 2
Dependent Claim
169 words
A GRAFT COPOLYMER WHICH IS TE REACITON PRODUCT FORMED BY THE PROCESS WHICH COMPRISES HEATING A MIXTURE OF (1) AN ORGANOPOLYSILOXANE CONSISTING ESSENTIALLY OF DIORGANOSILOXANE UNITS IN WHICH THE ORGANIC RADICALS ARE SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS OF LESS THAN 5 CARBON ATOMS AND PHENYL RADICALS, THERE BEING AT LEAST ONE OF SAID ALKYL RADICALS PER MOLECULE AND SAID ORGANOPOLYSILOXANE BEING ESSENTIALLY FREE OF SILICONBONDED HYDROGEN AND ESSENTIALLY FREE OF ORGANIC RADICALS HAVING ALIPHATIC UNSATURATION THEREIN, (2) A HALOGENATED OLEFIN, AND (3) A FREE RADICAL GENERATOR OF THE GROUP CONSISTING OF ORGANIC PEROXIDES AND AZO COMPOUNDS IN WHICH BOTH THE N ATOMS OF THE AZO LINKAGE ARE ATTACHED TO A TERTIARY CARBON ATOM AND THE REMAINING VALENCES OF SAID TERITARY CARBON ATOMS ARE SATIFIED BY RADICALS OF THE GROUP CONSISTING OF NITRILE RADICALS, CARBOXYALKYL RADICALS, CYCLOALKYLENE RADICALS, ALKYL RADICALS AND RADICALS OF THE FORMULA YOOC- IN WHICH Y IS AN ALKYL RADICAL, AT A TEMPERATURE ABOVE THAT AT WHICH THE FREE RADICAL GENERATOR FORMS FREE RADICALS.
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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |