US2991234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enameled aluminum and process for manufacture thereof
Assignee: Croname Inc
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Filing: 1958-08-11
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Granted: 1961-07-04
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Expires: 1978-08-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Andrus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:31
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C23; C23D; C23D3/00; C25D11/045; C25D11/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A METHOD OF COATING ALUMINUM WITH VITREOUS ENAMEL WHICH COMPRISES ELECTRO-CHEMICALLY PRODUCING AN ANODIC ALUMINUM OXIDE FILM HAVING A THICKNESS OF FROM ABOUT 0.0002 TO ABOUT 0.00005 INCH ON SAID ALUMINUM, DIRECTLY COATING AT LEAST A PORTION OF SAID FILM WITH A FUSIBLE VITREOUS MATERIAL, AND HEATING THE COATED FILM TO AT LEAST THE FUSION TEMPERATURE OF SAID VITREOUS MATERIAL.
Claim 2
Independent Claim
60 words
A METHOD OF COATING ALUMINUM WITH VITREOUS ENAMEL WHICH COMPRISES ELECTRO-CHEMICALLY PRODUCING AN ANODIC ALUMINUM OXIDE FILM HAVING A THICKNESS OF FROM ABOUT 0.0002 TO ABOUT 0.00005 INCH ON SAID ALUMINUM, DIRECTLY COATING AT LEAST A PORTION OF SAID FILM WITH A FUSIBLE VITREOUS MATERIAL, AND HEATING THE COATED FILM TO AT LEAST THE FUSION TEMPERATURE OF SAID VITREOUS MATERIAL.
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) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |