US5356725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion-resistant aluminum alloy brazing composite
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1993-09-09
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Granted: 1994-10-18
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Expires: 2013-09-09
Abstract
Abstract A novel aluminum alloy brazing composition is provided consisting of a core alloy consisting of a core alloy and a cladding on at least one side of the core alloy and wherein the core alloy consists essentially of manganese from about 0.8 to about 1.5%, silicon from about 0.45 to about 0.75%, titanium from about 0.03 to about 0.1%, a combined magnesium, copper and zinc content not in excess of about 0.15%, an iron content not in excess of about 0.3%, the total quantity of other impurities not exceeding about 0.15%, balance aluminum; and wherein the cladding consists of an AA 4XXX series aluminum alloy. The aluminum alloy brazing composition can be employed in the brazing of evaporators such as plate-fin evaporators utilized in the automotive field.
Inventors
- 👤 Edgar G. Eichhorn
- 👤 Arthur C. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:43
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/08; F28F21/089; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/28; B23K35/286; B32; B32B; B32B15/00; B32B15/01; B32B15/016; F28F21/081; F28F21/084; Y; Y10; Y10S; Y10S165/00; Y10S165/905; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
An aluminum alloy brazing composite consisting of an aluminum alloy core and an aluminum alloy cladding on at least one side of the core, wherein the core alloy consists essentially of manganese from about 0.8 to about 1.5%, silicon from about 0.45 to about 0.75%, titanium from about 0.03 to about 0.1%, a combined magnesium, copper and zinc content not in excess of about 0.15%, an iron content not in excess of about 0.3%, the total quantity of other impurities not exceeding about 0.15%, balance aluminum; and wherein the cladding consists of an AA 4XXX series aluminum alloy.
Claim 2
Dependent Claim
98 words
An aluminum alloy brazing composite consisting of an aluminum alloy core and an aluminum alloy cladding on at least one side of the core, wherein the core alloy consists essentially of manganese from about 0.8 to about 1.5%, silicon from about 0.45 to about 0.75%, titanium from about 0.03 to about 0.1%, a combined magnesium, copper and zinc content not in excess of about 0.15%, an iron content not in excess of about 0.3%, the total quantity of other impurities not exceeding about 0.15%, balance aluminum; and wherein the cladding consists of an AA 4XXX series aluminum alloy.
Claim 3
Dependent Claim
24 words
The core alloy of claim 1 wherein the combined magnesium, copper and zinc content of the alloy is not in excess of about 0.10%.
Claim 4
Dependent Claim
20 words
The core alloy of claim 1 wherein the titanium content is within the range from about 0.03 to about 0.07%.
Claim 5
Dependent Claim
17 words
The composite of claim 1 wherein the cladding is selected from AA 4047, 4147 and 4104 alloys.
Claim 6
Dependent Claim
24 words
The composite of claim 1 wherein the core alloy is in sheet form and it is clad on both sides with the cladding alloy.
Claim 7
Dependent Claim
16 words
The composite of claim 1, wherein the composite has been annealed and aged to O-temper condition.
References Cited (Backward Citations)
US3843333A
Cited
US4203490A
Cited
US4357397A
Cited
US4317484A
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US4574878A
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US4489140A
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US4636356A
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US4906534A
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US5041343A
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US4991647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-17 | 2002-04-18 | 2002-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-17 | 2006-04-18 | 2006-10-18 | $7700.00 | Window Closed / Lapsed |