US2606866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating tin plate
Assignee: United States Steel Corp
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Filing: 1948-10-27
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Granted: 1952-08-12
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Expires: 1968-10-27
Abstract
No abstract record available.
Inventors
- 👤 Richard A Neish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:00
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN A METHOD OF TREATING SHEET MATERIAL HAVING A TIN SURFACE, TO INHIBIT THE TENDENCY THEREOF TO SULPHIDE STAINING AND BAKING DISCOLORATION AND INCREASE THE ADHERENCE OF LACQUER, THE STEPS INCLUDING FIRST MAKING THE MATERIAL CATHODE IN AN ACID SOLUTION CONTAINING FROM 2 TO 3% OF A CHROMATE OF AN ALKALI METAL AND HAVING A PH VALUE OF FROM 2 TO 7, THEREBY AT LEAST PARTIALLY REDUCING THE OXIDE FILM INITIALLY EXISTING ON THE MATERIAL, AND IMMEDIATELY THEREAFTER MAKING THE MATERIAL ANODE WHILE STILL IN SAID SOLUTION, THEREBY RE-OXIDIZING THE TIN SURFACE AND FORMING THEREON A WATER-INSOLUBLE PROTECTIVE FILM OF A COMPLEX COMBINATION OF THE OXIDE AND SAID CHROMATE.
Claim 2
Dependent Claim
109 words
IN A METHOD OF TREATING SHEET MATERIAL HAVING A TIN SURFACE, TO INHIBIT THE TENDENCY THEREOF TO SULPHIDE STAINING AND BAKING DISCOLORATION AND INCREASE THE ADHERENCE OF LACQUER, THE STEPS INCLUDING FIRST MAKING THE MATERIAL CATHODE IN AN ACID SOLUTION CONTAINING FROM 2 TO 3% OF A CHROMATE OF AN ALKALI METAL AND HAVING A PH VALUE OF FROM 2 TO 7, THEREBY AT LEAST PARTIALLY REDUCING THE OXIDE FILM INITIALLY EXISTING ON THE MATERIAL, AND IMMEDIATELY THEREAFTER MAKING THE MATERIAL ANODE WHILE STILL IN SAID SOLUTION, THEREBY RE-OXIDIZING THE TIN SURFACE AND FORMING THEREON A WATER-INSOLUBLE PROTECTIVE FILM OF A COMPLEX COMBINATION OF THE OXIDE AND SAID CHROMATE.
References Cited (Backward Citations)
GB416608A
Cited
US2215165A
Cited
GB486752A
Cited
US2312076A
Cited
US2424718A
Cited
US2503217A
Cited
US2450509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |