Patent US4630767A successfully refreshed from Google Patents.
US4630767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of brazing using a ductile low temperature brazing alloy
Assignee: Osram Sylvania Inc
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Filing: 1985-08-15
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Granted: 1986-12-23
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Expires: 2005-08-15
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
2026-10-27 17:46
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/302; B23K35/28; B23K35/286; B23K35/288; B23K35/3006; C; C22; C22C; C22C5/00; C22C5/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
116 words
The method of joining silicon nitride to another part by brazing comprising the steps of: preparing a brazing alloy composition consisting essentially of 20 to 98.75 weight percent silver, 20 to 40 weight percent copper, and 0.25 to 4 weight percent titanium, said composition having a liquidus temperature in the range from about 750° to 950° C.; rolling the brazing alloy composition down to a thin foil; disposing brazing alloy in said thin foil form between an assembly comprising the silicon nitride and the part to which the silicon nitride is to be brazed; and heating said assembly in vacuum to a temperature at which the foil melts, thereby brazing the silicon nitride to said part.
Claim 2
Independent Claim
116 words
The method of joining silicon nitride to another part by brazing comprising the steps of: preparing a brazing alloy composition consisting essentially of 20 to 98.75 weight percent silver, 20 to 40 weight percent copper, and 0.25 to 4 weight percent titanium, said composition having a liquidus temperature in the range from about 750° to 950° C.; rolling the brazing alloy composition down to a thin foil; disposing brazing alloy in said thin foil form between an assembly comprising the silicon nitride and the part to which the silicon nitride is to be brazed; and heating said assembly in vacuum to a temperature at which the foil melts, thereby brazing the silicon nitride to said part.
Claim 3
Independent Claim
112 words
The method of joining silicon nitride to a mild steel part by brazing comprising the steps of: preparing a brazing alloy composition consisting of 70.6 weight percent silver, 27.4 weight percent copper, and 2 weight percent titanium, said composition having a liquidus temperature in the range from about 750° to 950° C.; rolling the brazing alloy composition down to a 3 mil thick foil; disposing brazing alloy in said foil form between an assembly comprising the silicon nitride and a mild steel part to which the silicon nitride is to be brazed; and heating said assembly in vacuum at about 920° C. thereby brazing the silicon nitride to the mild steel part.
Claim 4
Independent Claim
112 words
The method of joining silicon nitride to a mild steel part by brazing comprising the steps of: preparing a brazing alloy composition consisting of 70.6 weight percent silver, 27.4 weight percent copper, and 2 weight percent titanium, said composition having a liquidus temperature in the range from about 750° to 950° C.; rolling the brazing alloy composition down to a 3 mil thick foil; disposing brazing alloy in said foil form between an assembly comprising the silicon nitride and a mild steel part to which the silicon nitride is to be brazed; and heating said assembly in vacuum at about 920° C. thereby brazing the silicon nitride to the mild steel part.
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) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |