Patent US2838472A successfully refreshed from Google Patents.
US2838472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanization of silicone rubber
Assignee: General Electric Co
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Filing: 1955-01-06
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Granted: 1958-06-10
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Expires: 1975-01-06
Abstract
No abstract record available.
Inventors
- 👤 Glennard R Lucas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:50
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/24; C08G77/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A CURABLE COMPOSITION OF MATTER COMPRISING (1) AN ORGANOPOLYSILOXANE CONVERTIBLE TO THE CURED, SOLID, ELASTIC STATE, THE ORGANIC GROUPS OF THE ORGANOPOLYSILOXANE BEING SELECTED FROM THE CLASS CONSISTING OF MONOVALENT HYDROCARBON RADICALS AND CHLORINATED PHENYL RADICALS, THERE BEING PRESENT AN AVERAGE OF FROM ABOUT 1.98 TO 2.05 SILICON-BONDED ORGANIC RADICALS PER SILICON ATOM, AND (2) A CURING AGENT FOR (1) COMPRISING A FINELY DIVIDED PERIOXIDE SELECTED FROM THE CLASS CONSISTING OF BENZOYL PERIOXIDE AND BIS(2,4-DICHLOROBENZOYL) PERIOXIDE, IN WHICH AT LEAST 95 PERCENT OF THE PERIOXIDE PARTICLES HAVE AN AVERAGE PARTICLE DIAMETER BELOW 12 MICRONS AND ESSENTIALLY ALL THE PARTICLES OF THE PERIOXIDE HAVING AN AVERAGE PARTICLE DIAMETER BELOW 20 MICRONS, THE SAID FINELY DIVIDED PERIOXIDE CONTAINING FROM 2 TO 5%, BY WEIGHT, THEREOF OF WATER AND BEING IN THE FORM OF A CREAMY DISPERSION IN A METHYLPOLYSILOXANE FLUID WHEREIN THE BENZOYL PEROXIDE COMPRISES FROM 25 TO 75%, BY WEIGHT, OF THE ENTIRE DISPERSION.
Claim 2
Dependent Claim
153 words
A CURABLE COMPOSITION OF MATTER COMPRISING (1) AN ORGANOPOLYSILOXANE CONVERTIBLE TO THE CURED, SOLID, ELASTIC STATE, THE ORGANIC GROUPS OF THE ORGANOPOLYSILOXANE BEING SELECTED FROM THE CLASS CONSISTING OF MONOVALENT HYDROCARBON RADICALS AND CHLORINATED PHENYL RADICALS, THERE BEING PRESENT AN AVERAGE OF FROM ABOUT 1.98 TO 2.05 SILICON-BONDED ORGANIC RADICALS PER SILICON ATOM, AND (2) A CURING AGENT FOR (1) COMPRISING A FINELY DIVIDED PERIOXIDE SELECTED FROM THE CLASS CONSISTING OF BENZOYL PERIOXIDE AND BIS(2,4-DICHLOROBENZOYL) PERIOXIDE, IN WHICH AT LEAST 95 PERCENT OF THE PERIOXIDE PARTICLES HAVE AN AVERAGE PARTICLE DIAMETER BELOW 12 MICRONS AND ESSENTIALLY ALL THE PARTICLES OF THE PERIOXIDE HAVING AN AVERAGE PARTICLE DIAMETER BELOW 20 MICRONS, THE SAID FINELY DIVIDED PERIOXIDE CONTAINING FROM 2 TO 5%, BY WEIGHT, THEREOF OF WATER AND BEING IN THE FORM OF A CREAMY DISPERSION IN A METHYLPOLYSILOXANE FLUID WHEREIN THE BENZOYL PEROXIDE COMPRISES FROM 25 TO 75%, BY WEIGHT, OF THE ENTIRE DISPERSION.
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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |