Patent US2639264A successfully refreshed from Google Patents.
US2639264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitreous enameling processes and products
Assignee: Poor and Co
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Filing: 1949-04-13
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Granted: 1953-05-19
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Expires: 1969-04-13
Abstract
No abstract record available.
Inventors
- 👤 Allan E Chester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:25
CPC Classifications
C; C23; C23D; C23D3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD OF CONTROLLING THE ADHERENCE OF VITREOUS ENAMELS TO MILD ALLOY STEELS WHICH CONSISTS ESSENTIALLY IN SUBJECTING A MILD ALLOY STEEL HAVING A CARBON CONTENT BETWEEN 0.02% AND 0.20% TO THE ACTION OF A SURFACE ETCHING BATH COMPRISING AN ACID SOLUTION OF FERROUS SULFATE, MANGANESE DIOXIDE AND A COMPOUND FROM THE GROUP CONSISTING OF THE SOLUBLE SALTS OF ZINC, CADMIUM, ALUMINUM AND MANGANESIUM, TREATING THE STEEL WITH A DILUTE SUBSTANTIALLY NON-ETCHING ACID SOLUTION CONTAINING A SOLUBLE SALT OF A METAL FROM THE GROUP CONSISTING OF NICKEL AND COBALT, THEN ELECTRODEPOSITING ON THE STEEL A THIN COATING OF A METAL FROM THE GROUP CONSISTING OF NICKEL, COBALT AND ALLOYS OF NICKEL AND COBALT, AND FIRING A VITREOUS ENAMELS ON THE PLATED SURFACE.
Claim 2
Independent Claim
122 words
A METHOD OF CONTROLLING THE ADHERENCE OF VITREOUS ENAMELS TO MILD ALLOY STEELS WHICH CONSISTS ESSENTIALLY IN SUBJECTING A MILD ALLOY STEEL HAVING A CARBON CONTENT BETWEEN 0.02% AND 0.20% TO THE ACTION OF A SURFACE ETCHING BATH COMPRISING AN ACID SOLUTION OF FERROUS SULFATE, MANGANESE DIOXIDE AND A COMPOUND FROM THE GROUP CONSISTING OF THE SOLUBLE SALTS OF ZINC, CADMIUM, ALUMINUM AND MANGANESIUM, TREATING THE STEEL WITH A DILUTE SUBSTANTIALLY NON-ETCHING ACID SOLUTION CONTAINING A SOLUBLE SALT OF A METAL FROM THE GROUP CONSISTING OF NICKEL AND COBALT, THEN ELECTRODEPOSITING ON THE STEEL A THIN COATING OF A METAL FROM THE GROUP CONSISTING OF NICKEL, COBALT AND ALLOYS OF NICKEL AND COBALT, AND FIRING A VITREOUS ENAMELS ON THE PLATED SURFACE.
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) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |