US3624023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent silicone rubber vulcanizable under ambient conditions
Assignee: Dow Silicones Corp
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Filing: 1970-04-09
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Granted: 1971-11-30
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Expires: 1990-04-09
Abstract
Abstract A mixture of a fume silica treated with bis(trimethylsilyl)amine, a hydroxyl endblocked phenyl methyl polysiloxane, and alkoxy silicon compound and a curing catalyst cure at ambient conditions to a transparent silicone rubber useful as an encapsulant for electrical components.
Inventors
- 👤 James V Hartlage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:48
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/02; C08G77/04; C08G77/14; C08G77/16; C08G77/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
The silicone rubber composition in accordance with claim 1 in which the reinforcing fume silica is present in an amount of from 10 to 35 parts by weight, the viscosity of the hydroxyl endblocked phenyl methyl polysiloxane is from 1, 500 to 40,000 cs. at 25* C. and the alkoxy silicon compound is present in an amount of from two to six parts by weight.
Claim 2
Dependent Claim
15 words
The composition of claim 1 cured by exposure to moisture to a transparent silicone rubber.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |