Patent US4201601A successfully refreshed from Google Patents.
US4201601A
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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 11:40
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.
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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) | 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 |