Patent US2780592A successfully refreshed from Google Patents.
US2780592A
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Electrolytic treatment of metal surfaces
Assignee: Bethlehem Steel Corp
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Filing: 1951-08-22
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Granted: 1957-02-05
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Expires: 1971-08-22
Abstract
No abstract record available.
Inventors
- 👤 Richard M Wick
- 👤 Schneidewind Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:18
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/38; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12618
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS OF FORMING A NON-METALLIC COATING ON THE SURFACE OF A METAL ARTICLE WHICH COMPRISES ELECTROLYZING A METAL ARTICLE HAVING A SURFACE MATERIAL OF CORRODIBLE BASE METAL IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF CHROMIC ACID (100 TO 400 GRAMS PER LITER) AND A COMPOUND OF THE CLASS CONSISTING OF BORIC ACID AND THE ALKALI METAL AND ALKALINE EARTH METAL SALTS OF BORIC ACID, SAID COMPOUND BEING PRESENT IN AN AMOUNT OF FROM 8 GRAMS PER LITER TO SATURATION WITH SAID METAL ARTICLE ACTING AS THE CATHODE.
Claim 2
Dependent Claim
88 words
A PROCESS OF FORMING A NON-METALLIC COATING ON THE SURFACE OF A METAL ARTICLE WHICH COMPRISES ELECTROLYZING A METAL ARTICLE HAVING A SURFACE MATERIAL OF CORRODIBLE BASE METAL IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF CHROMIC ACID (100 TO 400 GRAMS PER LITER) AND A COMPOUND OF THE CLASS CONSISTING OF BORIC ACID AND THE ALKALI METAL AND ALKALINE EARTH METAL SALTS OF BORIC ACID, SAID COMPOUND BEING PRESENT IN AN AMOUNT OF FROM 8 GRAMS PER LITER TO SATURATION WITH SAID METAL ARTICLE ACTING AS THE CATHODE.
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) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |