Patent US2938010A successfully refreshed from Google Patents.
US2938010A
Expired / Lapsed
US
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Process for curing silica containing organo polysiloxane elastomers with amines and product obtained
Assignee: General Electric Co
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Filing: 1956-04-12
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Granted: 1960-05-24
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Expires: 1976-04-12
Abstract
No abstract record available.
Inventors
- 👤 Ben A Bluestein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:44
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A CURABLE COMPOSITION OF MATTER COMPRISING (1) AN ORGANOPOLYSILOXANE CONVERTIBLE TO THE CURED, SOLID, ELASTIC STATE HAVING A VISCOSITY OF AT LEAST 100,000 CENTIPOISES WHEN MEASURED AT 25*C. IN WHICH THE ORGANIC GROUPS ARE MONOVALENT HYDROCARBON RADICALS ATTACHED TO SILICON BY CARBON-SILICON LINKAGES, THE HYDROCARBON RADICALS CONSISTING SOLELY OF HYDROGEN AND CARBON ATOMS AND THERE BEING AN AVERAGE OF FROM ABOUT 1.98 TO 2.05 HYDROCARBON RADICALS PER SILICON ATOM, (2) A FINELY DIVIDED SILICA FILLER, AND (3) A PRIMARY AMINE CURING AGENT SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC AMINES AND AROMATIC AMINES, ANY OXYGEN OF SAID AMINES BEING IN THE FORM OF AN ETHER LINKAGE AND SAID AMINE CURING AGENT BEING PRESENT, BY WEIGHT, IN AN AMOUNT EQUAL TO FROM ABOUT 0.1 TO 10 PERCENT, BASED ON THE WEIGHT OF THE CONVERTIBLE ORGANOPOLYSILOXANE.
Claim 2
Dependent Claim
134 words
A CURABLE COMPOSITION OF MATTER COMPRISING (1) AN ORGANOPOLYSILOXANE CONVERTIBLE TO THE CURED, SOLID, ELASTIC STATE HAVING A VISCOSITY OF AT LEAST 100,000 CENTIPOISES WHEN MEASURED AT 25*C. IN WHICH THE ORGANIC GROUPS ARE MONOVALENT HYDROCARBON RADICALS ATTACHED TO SILICON BY CARBON-SILICON LINKAGES, THE HYDROCARBON RADICALS CONSISTING SOLELY OF HYDROGEN AND CARBON ATOMS AND THERE BEING AN AVERAGE OF FROM ABOUT 1.98 TO 2.05 HYDROCARBON RADICALS PER SILICON ATOM, (2) A FINELY DIVIDED SILICA FILLER, AND (3) A PRIMARY AMINE CURING AGENT SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC AMINES AND AROMATIC AMINES, ANY OXYGEN OF SAID AMINES BEING IN THE FORM OF AN ETHER LINKAGE AND SAID AMINE CURING AGENT BEING PRESENT, BY WEIGHT, IN AN AMOUNT EQUAL TO FROM ABOUT 0.1 TO 10 PERCENT, BASED ON THE WEIGHT OF THE CONVERTIBLE ORGANOPOLYSILOXANE.
References Cited (Backward Citations)
US2728743A
Cited
US2658881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |