US3856479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuously cast plate with textured surface
Assignee: Alcoa Corp
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Filing: 1972-04-03
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Granted: 1974-12-24
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Expires: 1992-04-03
Abstract
Abstract Decorative plate or sheet having an attractive textured surface is continuously cast in an open ended chilled mold. The freezing plate ingot has a surface solidified in a varying and cyclic fashion by applying thereto a volatile lubricant at a rate much higher than that normally employed in similar casting arrangements. The resulting plate exhibits a textured surface with accompanying variations in composition and metallurgical structure such that the response to electrolytic anodizing treatments varies and the anodized surface exhibits varying shades and colors.
Inventors
- 👤 C Howle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:02
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/12; B22D11/14; B22D11/143; B22D21/00; B22D21/002; B22D21/007; C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10T; Y10T428/00; Y10T428/12; Y10T428/12389; Y10T428/12993
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
IMPROVED CONTINOUSLY CAST DECORATIVE PLATE NOT OVER 1 INCH IN THICKNESS COMPOSED OF AN ALUMINUM ALLOY CONSISTING ESSENTIALLY OF 3 TO 13 PERCENT SILICON, BALANCE ESSENTIALLY ALUMINUM, CHARACTERIZED BY A SUBSTANTIALLY UNIFORM INTERNAL STRUCTURE THROUGHOUT EXCEPT FOR A SURFACE REGION INCUDING A TEXTURED SURFACE HAVING MULTIPLICITIES OF OUTER AND INNER FACES AND BY DIFFERENT CONSTITUENT DISTRIBUTION PATTERRNS IN AN ALUMINOUS MATRIX ASSOCIATED WITH SAID FACS SUCH AS TO PROVIDE A REPEATING OCCURRENCE OF EACH RESPECTIVE PATTERN ASSOCIATED WITH THE RESPECTIVE INNER AND OUTER FACES SUCH THAT THE PATTERN IN THE REGION OF THE OUTER FACES IS FINE AND CLOSELY SPACED WHEREAS THAT IN THE REGION OF THE INNER FACES IS COARSE AND WIDELY SPACED SO AS TO PRODUCE, IN RESPONSE TO INTEGRAL COLOR ANOIDC COATING TREATMENTS, DIFFERENT COLOR-SHADE DEVELOPMENT SUCH THAT SAID OUTER FACES PRODUCE A DARKER COLOR-SHADE EFFECT AND THE INNER FACES PRODUCE A DIFFERENT AND LIGHTER EFFECT, WHICH EFFECTS OCCUR REPEATEDLY THROUGHOUT SAID TEXTURED SURFACE.
Claim 2
Dependent Claim
157 words
IMPROVED CONTINOUSLY CAST DECORATIVE PLATE NOT OVER 1 INCH IN THICKNESS COMPOSED OF AN ALUMINUM ALLOY CONSISTING ESSENTIALLY OF 3 TO 13 PERCENT SILICON, BALANCE ESSENTIALLY ALUMINUM, CHARACTERIZED BY A SUBSTANTIALLY UNIFORM INTERNAL STRUCTURE THROUGHOUT EXCEPT FOR A SURFACE REGION INCUDING A TEXTURED SURFACE HAVING MULTIPLICITIES OF OUTER AND INNER FACES AND BY DIFFERENT CONSTITUENT DISTRIBUTION PATTERRNS IN AN ALUMINOUS MATRIX ASSOCIATED WITH SAID FACS SUCH AS TO PROVIDE A REPEATING OCCURRENCE OF EACH RESPECTIVE PATTERN ASSOCIATED WITH THE RESPECTIVE INNER AND OUTER FACES SUCH THAT THE PATTERN IN THE REGION OF THE OUTER FACES IS FINE AND CLOSELY SPACED WHEREAS THAT IN THE REGION OF THE INNER FACES IS COARSE AND WIDELY SPACED SO AS TO PRODUCE, IN RESPONSE TO INTEGRAL COLOR ANOIDC COATING TREATMENTS, DIFFERENT COLOR-SHADE DEVELOPMENT SUCH THAT SAID OUTER FACES PRODUCE A DARKER COLOR-SHADE EFFECT AND THE INNER FACES PRODUCE A DIFFERENT AND LIGHTER EFFECT, WHICH EFFECTS OCCUR REPEATEDLY THROUGHOUT SAID TEXTURED SURFACE.
Claim 3
Dependent Claim
14 words
The plate according to claim 1 which does not exceed one-half inch in thickness.
Claim 4
Dependent Claim
36 words
The plate according to claim 1 wherein the aluminum alloy contains one or more of the elements selected from the group consisting of up to 1% Mg, up to 0.7% Cr and up to 0.7% Cu.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |