Patent US2684379A successfully refreshed from Google Patents.
US2684379A
Expired / Lapsed
US
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Process for producing polysiloxanes
Assignee: UCB SA
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Filing: 1949-12-20
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Granted: 1954-07-20
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Expires: 1969-12-20
Abstract
No abstract record available.
Inventors
- 👤 Guillissen Clement Joseph
- 👤 Gancberg Abraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:50
CPC Classifications
C; C08; C08G; C08G77/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR PRODUCING POLYMERIZED ORGANIC SILICON COMPOUNDS COMPRISING: REACTING IN AN ANHYDROUS MIXTURE AN ORGANO-POLYHALO-SILANE WITH (1) A SUBSTANTIALLY STABLE ORGANO-POLYHYDROXY-SILANE, SELECTED FROM THE GROUP CONSISTING OF POLYHYDROXY-SILANE MONOMERS AND (2) LOWER MOLECULAR WEIGHT POLYHYDROXY-SILANE POLYMERS, THE NUMBER OF HALOGEN ATOMS IN THE REACTANTS BEING SUBSTANTIALLY EQUAL TO THE NUMBER OF HYDROXY RADICALS, AND SAID ORGANO RADICALS BEING SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, AND ALICYCLIC HYDROCARBON RADICALS CONTAINING BETWEEN ONE AND TEN CARBON ATOMS, SAID REACTION LIBERATING HYDROGEN HALIDE, AND POLYMERIZING THE RESULTING PRODUCT TO FORM A SUBSTANTIALLY UNIFORM POLYMERIZABLE POLYMER IN WHICH AT LEAST TWO SILICON ATOMS ARE CONNECTED BY AN OXYGEN ATOM.
Claim 2
Dependent Claim
108 words
A PROCESS FOR PRODUCING POLYMERIZED ORGANIC SILICON COMPOUNDS COMPRISING: REACTING IN AN ANHYDROUS MIXTURE AN ORGANO-POLYHALO-SILANE WITH (1) A SUBSTANTIALLY STABLE ORGANO-POLYHYDROXY-SILANE, SELECTED FROM THE GROUP CONSISTING OF POLYHYDROXY-SILANE MONOMERS AND (2) LOWER MOLECULAR WEIGHT POLYHYDROXY-SILANE POLYMERS, THE NUMBER OF HALOGEN ATOMS IN THE REACTANTS BEING SUBSTANTIALLY EQUAL TO THE NUMBER OF HYDROXY RADICALS, AND SAID ORGANO RADICALS BEING SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, AND ALICYCLIC HYDROCARBON RADICALS CONTAINING BETWEEN ONE AND TEN CARBON ATOMS, SAID REACTION LIBERATING HYDROGEN HALIDE, AND POLYMERIZING THE RESULTING PRODUCT TO FORM A SUBSTANTIALLY UNIFORM POLYMERIZABLE POLYMER IN WHICH AT LEAST TWO SILICON ATOMS ARE CONNECTED BY AN OXYGEN ATOM.
References Cited (Backward Citations)
US2486162A
Cited
US2469890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |