US2683672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitreous enameling method and composition
Assignee: Poor and Co
•
Filing: 1950-05-10
•
Granted: 1954-07-13
•
Expires: 1970-05-10
Abstract
No abstract record available.
Inventors
- 👤 Allan E Chester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:00
CPC Classifications
C; C23; C23D; C23D3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
IN A METHOD OF COATING FERROUS METALS WITH VITREOUS ENAMELS, THE STEP WHICH COMPRISES PRETREATING THE FERROUS METAL WITH A SUBSTANTIALLY UNIFORM THIN COATING CONTAINING POTASSIUM ANTIMONYL TARTRATE AND A CHLORIDE OF A METAL FROM THE GROUP CONSISTING OF NICKEL AND COBLAT.
Claim 2
Dependent Claim
42 words
IN A METHOD OF COATING FERROUS METALS WITH VITREOUS ENAMELS, THE STEP WHICH COMPRISES PRETREATING THE FERROUS METAL WITH A SUBSTANTIALLY UNIFORM THIN COATING CONTAINING POTASSIUM ANTIMONYL TARTRATE AND A CHLORIDE OF A METAL FROM THE GROUP CONSISTING OF NICKEL AND COBLAT.
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Cited
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US2321658A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |