Patent US2720495A successfully refreshed from Google Patents.
US2720495A
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Rubber-filler-silicone compounds and their manufacture
Assignee: CALVIN WHITE H
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Filing: 1947-09-25
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Granted: 1955-10-11
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Expires: 1967-09-25
Abstract
No abstract record available.
Inventors
- 👤 Ellis H Phreaner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:44
CPC Classifications
C; C08; C08L; C08L21/00; C08L11/00; C08L7/00; C08L9/00; C08L9/02; C08L9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE COMPOSITION COMPRISING A VULCANIZED RUBBER OF THE CLASS CONSISTING OF NATURAL RUBBER AND BUTADIENESTYRENE, BUTADIENE-ACRYLONITRILE, CHLOROPRENE-ISOPRENE, CHLOROPRENE-ACRYLONITRILE, COPOLYMERS, AND POLYCHLOROPRENE, CONTAINING A UNIFORM DISPERSION OF THE COMPLETELY POLYMERIZED THERMALLY STABLE LIQUID POLYMER OF A DIHYDROCARBON SUBSTITUTED SILOXANE IN WHICH THE SUBSTITUENT GROUPS ARE OF THE CLASS CONSISTING OF ALKYL AND ARYL GROUPS, SAID COMPOSITION CONTAINING IN EXCESS OF ONE-HALF PART BY WEIGHT OF THE LIQUID POLYMER FOR ONE HUNDRED PARTS OF THE VULCANIZED RUBBER, AND SAID COMPOSITION CONTAINING A FILLER HAVING A SILICATE RADICAL BONDED TO THE SILOXANE POLYMER.
Claim 2
Dependent Claim
90 words
THE COMPOSITION COMPRISING A VULCANIZED RUBBER OF THE CLASS CONSISTING OF NATURAL RUBBER AND BUTADIENESTYRENE, BUTADIENE-ACRYLONITRILE, CHLOROPRENE-ISOPRENE, CHLOROPRENE-ACRYLONITRILE, COPOLYMERS, AND POLYCHLOROPRENE, CONTAINING A UNIFORM DISPERSION OF THE COMPLETELY POLYMERIZED THERMALLY STABLE LIQUID POLYMER OF A DIHYDROCARBON SUBSTITUTED SILOXANE IN WHICH THE SUBSTITUENT GROUPS ARE OF THE CLASS CONSISTING OF ALKYL AND ARYL GROUPS, SAID COMPOSITION CONTAINING IN EXCESS OF ONE-HALF PART BY WEIGHT OF THE LIQUID POLYMER FOR ONE HUNDRED PARTS OF THE VULCANIZED RUBBER, AND SAID COMPOSITION CONTAINING A FILLER HAVING A SILICATE RADICAL BONDED TO THE SILOXANE POLYMER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |