Patent US2909552A successfully refreshed from Google Patents.
US2909552A
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Process for the preparation of alkoxy and aralkoxy-methylpolysiloxanes
Assignee: Rhone Poulenc SA
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Filing: 1957-07-01
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Granted: 1959-10-20
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Expires: 1977-07-01
Abstract
No abstract record available.
Inventors
- 👤 Chevalier Pierre Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:29
CPC Classifications
C; C08; C08G; C08G77/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR THE PRODUCTION OF METHYL ALKOXYPOLYSILOXANES WHICH COMPRISES REACTING A METHYLPOLYSILOXANE CONTAINING SILICON-HYDROGEN LINKAGES WITH A COMPOUND WHICH IS FREE FROM HYDROXYL GROUPS AND IS SELECTED FROM THE CLASS CONSISTING OF SATURATED AND AROMATIC MONOALDEHYDES, MONO-KETONES AND MONO-ESTERS, IN THE PRESENCE OF A CATALYST SELECTED FROM THE CLASS CONSISTING OF BUTYL TITANATE AND ZINC.
Claim 2
Dependent Claim
56 words
A PROCESS FOR THE PRODUCTION OF METHYL ALKOXYPOLYSILOXANES WHICH COMPRISES REACTING A METHYLPOLYSILOXANE CONTAINING SILICON-HYDROGEN LINKAGES WITH A COMPOUND WHICH IS FREE FROM HYDROXYL GROUPS AND IS SELECTED FROM THE CLASS CONSISTING OF SATURATED AND AROMATIC MONOALDEHYDES, MONO-KETONES AND MONO-ESTERS, IN THE PRESENCE OF A CATALYST SELECTED FROM THE CLASS CONSISTING OF BUTYL TITANATE AND ZINC.
References Cited (Backward Citations)
FR1037037A
Cited
US2658908A
Cited
FR1054055A
Cited
GB730379A
Cited
FR1074538A
Cited
US2721873A
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 |