US3754969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of adhering room temperature vulcanizable silicone rubber to metal surfaces
Assignee: Dow Silicones Corp
•
Filing: 1971-06-18
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Granted: 1973-08-28
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Expires: 1991-06-18
Abstract
Abstract The adhesion to metal surfaces of room temperature vulcanizable silicone rubber curable through condensation of silicon-bonded hydroxyls with silicon-bonded alkoxy radicals or silicon-bonded hydrogen atoms is improved by contacting the metal surface with acetic acid, formic acid, propionic acid, butyric acid, benzoic acid, toluic acid, metal salts thereof and ammonium salts thereof, removing any excess acid or salt from the surface along with any extraneous materials formed during the contacting, drying the surface and thereafter applying the room temperature vulcanizable silicone rubber to the treated surface and allowing it to cure.
Inventors
- 👤 T Greenlee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:24
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
20 words
The method in accordance with claim 1 wherein the compound is in a liquid state when contacting the metal surface.
Claim 2
Dependent Claim
15 words
The method in accordance with claim 2 wherein the liquid state is an aqueous solution.
Claim 3
Dependent Claim
16 words
The method in accordance with claim 2 wherein the liquid state is an organic solvent solution.
Claim 4
Dependent Claim
43 words
The method in accordance with claim 2 wherein the metal surface contacted with the compound is rinsed with an organic solvent to remove from the metal surface any excess compound and any extraneous materials formed by contacting the metal surface with the compound.
Claim 5
Dependent Claim
14 words
The method in accordance with claim 2 in which the compound is acetic acid.
Claim 6
Dependent Claim
33 words
The method in accordance with claim 1 in which metal of the soluble metal salts is selected from the group consisting of Group I metals and Group II metals of the Periodic Table.
Claim 7
Dependent Claim
15 words
The method in accordance with claim 7 in which the metal salt is sodium acetate.
Claim 8
Dependent Claim
15 words
The method in accordance with claim 1 in which the metal salt is ammonium acetate.
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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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |