US4623513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ductile low temperature brazing alloy
Assignee: Osram Sylvania Inc
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Filing: 1984-09-20
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Granted: 1986-11-18
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Expires: 2004-09-20
Abstract
Abstract Titanium-silver alloys containing specified amounts of silver and titanium and controlled amounts of copper, aluminum and mixtures thereof are suitable for brazing ceramics, other non-metallic and metallic materials. These alloys also may contain controlled amounts of tin, palladium, indium and mixtures thereof.
Inventors
- 👤 Howard Mizuhara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:29
CPC Classifications
C; C22; C22C; C22C5/00; C22C5/06; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/28; B23K35/286; B23K35/288; B23K35/30; B23K35/3006; B23K35/302
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
A brazing alloy consisting essentially of from about 0.25% to about 4% by weight of a reactive metal, selected from the group consisting of titanium, vanadium, zirconium and mixtures thereof, from about 20% by weight to about 98.75% by weight of silver and from about 1% to about 70% by weight of aluminum wherein said alloy has a liquidus temperature of from about 600° C. to about 950° C.
Claim 2
Dependent Claim
69 words
A brazing alloy consisting essentially of from about 0.25% to about 4% by weight of a reactive metal, selected from the group consisting of titanium, vanadium, zirconium and mixtures thereof, from about 20% by weight to about 98.75% by weight of silver and from about 1% to about 70% by weight of aluminum wherein said alloy has a liquidus temperature of from about 600° C. to about 950° C.
Claim 3
Dependent Claim
24 words
An alloy according to claim 1 wherein said aluminum is present in amounts of from about 4% by weight to about 10% by weight.
Claim 4
Dependent Claim
99 words
A brazing alloy consisting essentially of from about 0.25% to about 4% by weight of a reactive metal selected from the group consisting of titanium, vanadium, zirconium and mixtures thereof, from about 20% by weight to about 85% by weight of silver, from about 1% to about 70% of a first metal selected from the group consisting of copper, aluminum and mixtures and from about 3% to about 30% by weight of a second metal selected from tin, palladium, indium and mixtures thereof wherein said alloy has a liquidus temperature of from about 600° C. to about 950° C.
Claim 5
Dependent Claim
99 words
A brazing alloy consisting essentially of from about 0.25% to about 4% by weight of a reactive metal selected from the group consisting of titanium, vanadium, zirconium and mixtures thereof, from about 20% by weight to about 85% by weight of silver, from about 1% to about 70% of a first metal selected from the group consisting of copper, aluminum and mixtures and from about 3% to about 30% by weight of a second metal selected from tin, palladium, indium and mixtures thereof wherein said alloy has a liquidus temperature of from about 600° C. to about 950° C.
Claim 6
Dependent Claim
12 words
An alloy according to claim 3 wherein said reactive metal is titanium.
Claim 7
Dependent Claim
32 words
An alloy according to claim 3 wherein said first metal is copper and wherein said second metal is tin and is present in amounts of about 3% by weight to about 15%.
Claim 8
Dependent Claim
32 words
An alloy according to claim 3 wherein said first metal is copper and said second metal is palladium and is present in amounts of from about 5% to about 25% by weight.
Claim 9
Dependent Claim
32 words
An alloy according to claim 3 wherein said first metal is copper and said second metal is indium and is present in amounts of from about 2% to about 15% by weight.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |