US4201601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper brazing alloy foils containing germanium
Assignee: GTE Sylvania Inc
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Filing: 1979-03-08
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Granted: 1980-05-06
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Expires: 1999-03-08
Abstract
Abstract Alloys of the type Cu x Ge y wherein x is from about 60 to about 95 atomic percent and y is from about 5 to about 40 atomic percent are made ductile by the presence of appreciable amounts of an amorphous phase and a metastable, microcrystalline, solid solution single phase and are especially suited for fabrication of foil preforms for preplacement in the joint in a joining operation such as brazing.
Inventors
- 👤 Thomas L. D'Silva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:47
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0222; B23K35/0233; B23K35/22; B23K35/24; B23K35/30; B23K35/302; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A brazing alloy material consisting essentially of a composition having the formula Cu x Ge y wherein x is from about 60 to about 95 atomic percent, y is from about 5 to about 40 atomic percent and containing a sufficient amount of an amorphous phase and a metastable, microcrystalline solid solution phase to render the material ductile; said material being in the form of a sheet having a thickness of from about 0.0005 to about 0.005 inches.
Claim 2
Dependent Claim
78 words
A brazing alloy material consisting essentially of a composition having the formula Cu x Ge y wherein x is from about 60 to about 95 atomic percent, y is from about 5 to about 40 atomic percent and containing a sufficient amount of an amorphous phase and a metastable, microcrystalline solid solution phase to render the material ductile; said material being in the form of a sheet having a thickness of from about 0.0005 to about 0.005 inches.
Claim 3
Dependent Claim
28 words
A material according to claim 1 wherein x is from about 65 to about 85 atomic percent and y is from about 15 to about 35 atomic percent.
Claim 4
Dependent Claim
18 words
A material according to claim 1 wherein said thickness if from about 0.0015 inches to about 0.004 inches.
References Cited (Backward Citations)
DE681890C
Cited
US3158471A
Cited
US3579312A
Cited
US3427155A
Cited
US3600144A
Cited
US3856513A
Cited
JPS50117632A
Cited
US4124380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |