Patent US2718512A successfully refreshed from Google Patents.
US2718512A
Expired / Lapsed
US
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Siloxane elastomers containing zinc oxide or zinc peroxide and silica
Assignee: Dow Silicones Corp
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Filing: 1952-02-23
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Granted: 1955-09-20
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Expires: 1972-02-23
Abstract
No abstract record available.
Inventors
- 👤 Earl L Warrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:46
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A COMPOSITION OF MATTER COMPOSED OF A DIORGANOPOLYSILOXANE OF AT LEAST 5000 CS. VISCOSITY AT 250 C., A SILICA FILLER, AN ORGANIC PEROXIDE VULCANIZING AGENT AND FROM 1/16 TO 10 PARTS BY WEIGHT BASED UPON 100 PARTS BY WEIGHT SILOXANE OF AN ADDITIVE SELECTED FROM THE GROUP CONSISTING OF ZINC OXIDE AND ZINC PEROXIDE SAID SILOXANE HAVING FROM 1.9 TO 2 ORGANIC RADICALS PER SILICON ATOM SAID RADICALS BEING SELECTED FROM THE GROUP CONSISTING OF ALKYL, PHENYL AND SILICONEOPENTYL RADICALS, AT LEAST 50 PER CENT OF THE TOTAL NUMBER OF RADICALS BEING ALKYL.
Claim 2
Dependent Claim
93 words
A COMPOSITION OF MATTER COMPOSED OF A DIORGANOPOLYSILOXANE OF AT LEAST 5000 CS. VISCOSITY AT 250 C., A SILICA FILLER, AN ORGANIC PEROXIDE VULCANIZING AGENT AND FROM 1/16 TO 10 PARTS BY WEIGHT BASED UPON 100 PARTS BY WEIGHT SILOXANE OF AN ADDITIVE SELECTED FROM THE GROUP CONSISTING OF ZINC OXIDE AND ZINC PEROXIDE SAID SILOXANE HAVING FROM 1.9 TO 2 ORGANIC RADICALS PER SILICON ATOM SAID RADICALS BEING SELECTED FROM THE GROUP CONSISTING OF ALKYL, PHENYL AND SILICONEOPENTYL RADICALS, AT LEAST 50 PER CENT OF THE TOTAL NUMBER OF RADICALS BEING ALKYL.
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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) | 1958-09-19 | 1959-03-21 | 1959-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-19 | 1963-03-21 | 1963-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-19 | 1967-03-21 | 1967-09-20 | $7700.00 | Window Closed / Lapsed |