US4182628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partially amorphous silver-copper-indium brazing foil
Assignee: GTE Sylvania Products Inc
•
Filing: 1978-07-03
•
Granted: 1980-01-08
•
Expires: 1998-07-03
Abstract
Abstract Alloys of the atomic composition, Ag.sub.(25-66) Cu.sub.(16-68) In.sub.(7-18) in the form of thin foil, are made ductile by the presence of appreciable amounts of amorphous phase and a metastable, micro-crystalline, solid solution, single phase and are especially suited for fabricating preforms for preplacement in a joint to be joined by an operation such as brazing.
Inventors
- 👤 Thomas L. D'Silva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:32
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3006; B23K35/02; B23K35/0222; B23K35/0233; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12896
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
80 words
A ductile thin brazing foil consisting essentially of a composition consisting essentially of an alloy of the formula Ag x Cu y In z wherein x is from about 25 to about 66 atomic percent y is from about 16 to about 68 atomic percent z is from about 7 to about 18 atomic percent and containing an amorphous phase and a metastable, microcrystalline, solid solution single phase and having a thickness of from about 0.0005 to about 0.005 inches.
Claim 2
Dependent Claim
80 words
A ductile thin brazing foil consisting essentially of a composition consisting essentially of an alloy of the formula Ag x Cu y In z wherein x is from about 25 to about 66 atomic percent y is from about 16 to about 68 atomic percent z is from about 7 to about 18 atomic percent and containing an amorphous phase and a metastable, microcrystalline, solid solution single phase and having a thickness of from about 0.0005 to about 0.005 inches.
Claim 3
Dependent Claim
23 words
A sheet according to claim 1 wherein said indium content in said alloy is from about 12 to about 20 percent by weight.
Claim 4
Dependent Claim
36 words
A sheet according to claim 2 wherein said alloy has a copper content of from about 28 to 30 percent by weight and a silver content of from about 50 to about 60 percent by weight.
References Cited (Backward Citations)
US2970248A
Cited
GB1036245A
Cited
US3427154A
Cited
US3373016A
Cited
US3940293A
Cited
US4053728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-07 | 1983-07-09 | 1984-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-07 | 1987-07-09 | 1988-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-07 | 1991-07-09 | 1992-01-08 | $7700.00 | Window Closed / Lapsed |