US2733199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic treatment of metal
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:25
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
THE PROCESS OF FORMING A NON-METALLIC COATING ON THE SURFACES 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), A COMPOUND OF THE CLASS CONSISTING OF BORIC ACID AND SALTS OF BORIC ACID, SAID COMPOUND BEING PRESENT IN AN AMOUNT OF FROM 8 GRAMS PER LITER TO SATURATION, AND CHROMIUM CHROMATE IN WHICH THE TRIVALENT CHROMIUM IS PRESENT IN AN AMOUNT BETWEEN 2 PER CENT AND 18 PER CENT OF THE TOTAL CHROMIUM IN SOLUTION, SAID METAL ARTICLE ACTING AS THE CATHODE.
Claim 2
Dependent Claim
106 words
THE PROCESS OF FORMING A NON-METALLIC COATING ON THE SURFACES 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), A COMPOUND OF THE CLASS CONSISTING OF BORIC ACID AND SALTS OF BORIC ACID, SAID COMPOUND BEING PRESENT IN AN AMOUNT OF FROM 8 GRAMS PER LITER TO SATURATION, AND CHROMIUM CHROMATE IN WHICH THE TRIVALENT CHROMIUM IS PRESENT IN AN AMOUNT BETWEEN 2 PER CENT AND 18 PER CENT OF THE TOTAL CHROMIUM IN SOLUTION, SAID METAL ARTICLE ACTING AS THE CATHODE.
References Cited (Backward Citations)
GB254757A
Cited
US1827247A
Cited
US1838777A
Cited
US1853323A
Cited
US2063197A
Cited
US2635993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |