US3762939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of protecting a metallic surface from corrosion and resultant article
Assignee: General Electric Co
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Filing: 1971-07-02
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Granted: 1973-10-02
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Expires: 1991-07-02
Abstract
Abstract A corrosion protection system for metal. The metal surface to be protected is first cleaned of dirt, grease and the like, preferably by grit blasting. The cleaned surface is then coated first with a primer to promote adhesion between the metal and the basic protection coating. A protective top coat, preferably an epoxy, is applied over the primer either by spraying or fluid bed. Finally, an impact resistant over coat is applied over the epoxy top coat preferably by spraying to prevent damage to the top coat during handling.
Inventors
- 👤 R Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:10
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/16; H; H01; H01F; H01F27/00; H01F27/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/26; Y10T428/269; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
42 words
A method of protecting a metallic surface from corrosion as set forth in claim 1 in which said primer coat is a solvent spray epoxy material and said primer coat is air dried for approximately one hour before applying said epoxy coating.
Claim 2
Dependent Claim
64 words
A metal surface having a corrosion protection system thereon comprising a primer coating of epoxy firmly adhering to said metal surface, a primary corrosion coating of epoxy material in the range of 5 to 10 mils in thickness adhering to said primer coating and a polyvinyl chloride over coat in the range of 15 to 20 mils thick bonded to said epoxy primary coating.
Claim 3
Dependent Claim
67 words
A distribution transformer tank suitable for subsurface distribution having a corrosion protection coating system comprising an epoxy primer bonded to the metal surface of the transformer tank, an epoxy primary coat in the range of 5 to 10 mils in thickness bonded to said primer and a polyvinyl chloride over coat in the range of 15 to 20 mils in thickness bonded to said epoxy primary coat.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |