US2553937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrolytically polishing aluminum and its alloys
Assignee: Compagnie de Produits Chimiques et Electrometallurgiques Alais Froges et Camargue
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Filing: 1949-01-11
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Granted: 1951-05-22
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Expires: 1969-01-11
Abstract
No abstract record available.
Inventors
- 👤 Patrie Jos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:46
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/18; C25F3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN A METHOD FOR ELECTROLYTICALLY POLISHING AND BRIGHTENING ARTICLES CONSISTING AT LEAST FOR THE MAJOR PART OF ALUMINUM, THE STEP OF EFFECTING THE ELECTROLYTIC POLISHING AND BRIGHTENING TREATMENT AT A TEMPERATURE BELOW 20* C. IN AN ELECTROLYSIS BATH CONTAINING 30 TO 45% BY WEIGHT OF NITRIC ACID AND A SIGNIFICANT AMOUNT OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF PHOSPHORIC AND CHROMIC ACIDS, THE TOTAL OF THE ACIDS RANGING BETWEEN 43 AND 79% BY WEIGHT, THE BARLANCE BEING WATER.
Claim 2
Dependent Claim
81 words
IN A METHOD FOR ELECTROLYTICALLY POLISHING AND BRIGHTENING ARTICLES CONSISTING AT LEAST FOR THE MAJOR PART OF ALUMINUM, THE STEP OF EFFECTING THE ELECTROLYTIC POLISHING AND BRIGHTENING TREATMENT AT A TEMPERATURE BELOW 20* C. IN AN ELECTROLYSIS BATH CONTAINING 30 TO 45% BY WEIGHT OF NITRIC ACID AND A SIGNIFICANT AMOUNT OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF PHOSPHORIC AND CHROMIC ACIDS, THE TOTAL OF THE ACIDS RANGING BETWEEN 43 AND 79% BY WEIGHT, THE BARLANCE BEING WATER.
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) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |