US3639155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dirt-resistant silicone rubber
Assignee: Dow Silicones Corp
•
Filing: 1969-12-01
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Granted: 1972-02-01
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Expires: 1989-12-01
Abstract
Abstract A silicone rubber having a cured coating on a surface which is exposed to the atmosphere where said coating is a roomtemperature vulcanizable organosiloxane block copolymer curable through an acetoxy, ketoxime or alkoxy functionality is resistant to dirt pickup. A room-temperature vulcanizable organosiloxane block copolymer curable through an acetoxy, ketoxime or alkoxy functionality is applied to a silicone rubber surface and allowed to cure to provide a dirt-resistant coating.
Inventors
- 👤 Robert C Hartlein
- 👤 Harold L Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:51
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/44; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
27 words
The silicone rubber which is resistant to dirt pickup in accordance with claim 1 in which the base of silicone rubber is a room-temperature vulcanizable silicone rubber.
Claim 2
Dependent Claim
24 words
The silicone rubber which is resistant to dirt pickup in accordance with claim 2 in which the room-temperature vulcanizable silicone rubber is a sealant.
Claim 3
Dependent Claim
80 words
The silicone rubber which is resistant to dirt pickup in accordance with claim 1 in which (A) is present in an amount of from 50 to 70 inclusive mol percent and the polydiorganosiloxane is polydimethylsiloxane having from 25 to 100 dimethylsiloxane units per block, (B) is present in an amount of from 20 to 40 inclusive mol percent and the aryl radicals are phenyl radicals and (C) is present in an amount of from 4 to 20 inclusive mol percent.
Claim 4
Dependent Claim
19 words
The silicone rubber which is resistant to dirt pickup in accordance with claim 4 in which Y is acetoxy.
Claim 5
Dependent Claim
19 words
The silicone rubber which is resistant to dirt pickup in accordance with claim 4 in which Y is ketoxime.
Claim 6
Dependent Claim
19 words
The silicone rubber which is resistant to dirt pickup in accordance with claim 4 in which Y is alkoxy.
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |