US3041201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating ferrous metal base for vitreous enameling and coated metal base produced
Assignee: Inland Steel Co
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Filing: 1959-07-21
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Granted: 1962-06-26
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Expires: 1979-07-21
Abstract
No abstract record available.
Inventors
- 👤 Henry M Roelofs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:09
CPC Classifications
C; C23; C23C; C23C26/00; C23D; C23D3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCESS FOR ENAMELING A FERROUS METAL BASE WITH A SINGLE COVER COAT OF A LIGHT-COLORED VITREOUS ENAMEL COMPRISING THE STEPS OF PROVIDING ON THE SURFACE OF THE METAL BASE A COATING COMPRISING A FERROUS METAL VITREOUS ENAMEL ADHERENCE-PROMOTING METAL OXIDE ADMIXED WITH AN IRON COMPOUND WHICH ON THERMAL DECOMPOSITION PRODUCES FREE METALLIC IRON AND VOLATILE DECOMPOSITION PRODUCTS, HEATING THE SAID COATED BASE IN AN ATMOSPHERE NONUCTS, HEATING THE SAID COATED BASED IN AN ATMOSPHERE NONOXIDIZING TO IRON AT A TEMPERATURE AT WHICH THE SAID IRON COMPOUND DECOMPOSES TO METALLIC IRON AND REDUCTION OF THE SAID METAL OXIDE BY REACTION WITH FREE METALLIC IRON TAKES PLACE, APPLYING TO THE SURFACE OF THE BASE A COVER COAT OF LIGHT-COLORED VITREOUS ENAMEL WHICH IS SUBSTANTIALLY FREE OF DARK-COLORED ADHERENCE-PROMOTING OXIDES, AND FIRING SAID ENAMEL THEREON.
Claim 2
Dependent Claim
133 words
A PROCESS FOR ENAMELING A FERROUS METAL BASE WITH A SINGLE COVER COAT OF A LIGHT-COLORED VITREOUS ENAMEL COMPRISING THE STEPS OF PROVIDING ON THE SURFACE OF THE METAL BASE A COATING COMPRISING A FERROUS METAL VITREOUS ENAMEL ADHERENCE-PROMOTING METAL OXIDE ADMIXED WITH AN IRON COMPOUND WHICH ON THERMAL DECOMPOSITION PRODUCES FREE METALLIC IRON AND VOLATILE DECOMPOSITION PRODUCTS, HEATING THE SAID COATED BASE IN AN ATMOSPHERE NONUCTS, HEATING THE SAID COATED BASED IN AN ATMOSPHERE NONOXIDIZING TO IRON AT A TEMPERATURE AT WHICH THE SAID IRON COMPOUND DECOMPOSES TO METALLIC IRON AND REDUCTION OF THE SAID METAL OXIDE BY REACTION WITH FREE METALLIC IRON TAKES PLACE, APPLYING TO THE SURFACE OF THE BASE A COVER COAT OF LIGHT-COLORED VITREOUS ENAMEL WHICH IS SUBSTANTIALLY FREE OF DARK-COLORED ADHERENCE-PROMOTING OXIDES, AND FIRING SAID ENAMEL THEREON.
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) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |