US2821014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite aluminous metal article
Assignee: Alcoa Corp
•
Filing: 1951-05-31
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Granted: 1958-01-28
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Expires: 1971-05-31
Abstract
No abstract record available.
Inventors
- 👤 Mike A Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/016; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/28; B23K35/286; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/925; Y10S428/926; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A COMPOSITE ALUMINOUS METAL ARTICLE ADPATED TO BE JOINED TO ANOTHER METALLIC BODY BY THE BRAZING PROCESS, SAID ARTICLE HAVING A STRUCTURAL COMPONENT CONSISTING OF AN ALUMINUM BASE ALLOY THAT HAS A MELTING POINT NOT LOWER THEN 1080*F. AND IS SUSCEPTIBLE TO PENETRATION BY MOLTEN BRAZING FILLER METAL; A THIN ALUMINOUS INTERLAYER AT LEAST 0.0010" IN THICKNESS AND CONSTITUTING FROM 2 TO 10% OF THE TOTAL THICKNESS OF THE COMPOSITE ARTICLE, SAID INTERLAYER EXTENDING OVER AT LEAST A PORTION OF THE SURFACE OF SAID STRUCTURAL COMPONENT AND ADHESIVELY JOINED THERETO, SAID INTERLAYER ALSO HAVING A MELTING POINT NOT LOWER THAN 1180*F. AND ABOVE THAT OF THE STRUCTURAL COMPONENT; AND A LAYER OF BRAZING FILLER METAL ADHESIVELY JOINED TO SAID INTERLAYER COMPOSED OF AN ALUMINUM BASE ALLOY HAVING A MELTING POINT BELOW THAT OF THE STRUCTURAL COMPONENT, SAID BRAZING FILLER METAL BEING COMPLETELY SEPARATED FROM SAID STRUCTURAL COMPONENT BY SAID INTERLAYER, SAID COMPOSITE ARTICLE BEING CHARACTERIZED BY SUBSTANTIAL FREEDOM FROM PENETRATION OF THE STRUCTURAL COMPONENT BY MOLTEN FILLER METAL DURING THE BRAZING PROCESS.
Claim 2
Dependent Claim
172 words
A COMPOSITE ALUMINOUS METAL ARTICLE ADPATED TO BE JOINED TO ANOTHER METALLIC BODY BY THE BRAZING PROCESS, SAID ARTICLE HAVING A STRUCTURAL COMPONENT CONSISTING OF AN ALUMINUM BASE ALLOY THAT HAS A MELTING POINT NOT LOWER THEN 1080*F. AND IS SUSCEPTIBLE TO PENETRATION BY MOLTEN BRAZING FILLER METAL; A THIN ALUMINOUS INTERLAYER AT LEAST 0.0010" IN THICKNESS AND CONSTITUTING FROM 2 TO 10% OF THE TOTAL THICKNESS OF THE COMPOSITE ARTICLE, SAID INTERLAYER EXTENDING OVER AT LEAST A PORTION OF THE SURFACE OF SAID STRUCTURAL COMPONENT AND ADHESIVELY JOINED THERETO, SAID INTERLAYER ALSO HAVING A MELTING POINT NOT LOWER THAN 1180*F. AND ABOVE THAT OF THE STRUCTURAL COMPONENT; AND A LAYER OF BRAZING FILLER METAL ADHESIVELY JOINED TO SAID INTERLAYER COMPOSED OF AN ALUMINUM BASE ALLOY HAVING A MELTING POINT BELOW THAT OF THE STRUCTURAL COMPONENT, SAID BRAZING FILLER METAL BEING COMPLETELY SEPARATED FROM SAID STRUCTURAL COMPONENT BY SAID INTERLAYER, SAID COMPOSITE ARTICLE BEING CHARACTERIZED BY SUBSTANTIAL FREEDOM FROM PENETRATION OF THE STRUCTURAL COMPONENT BY MOLTEN FILLER METAL DURING THE BRAZING PROCESS.
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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) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |