Patent US4591535A successfully refreshed from Google Patents.
US4591535A
Expired / Lapsed
US
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Method of brazing ceramics using active brazing alloys
Assignee: Osram Sylvania Inc
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Filing: 1984-06-20
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Granted: 1986-05-27
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Expires: 2004-06-20
Abstract
Abstract An article is disclosed consisting essentially of a ceramic substrate bonded to a metal or ceramic member by a brazing alloy. In these processes, the ceramic surface is prepared such that it is relatively defect free prior to brazing.
Inventors
- 👤 Howard Mizuhara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:19
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/003; C04B37/006; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3006; B23K35/3013; B23K35/302; C04B37/02; C04B37/023; C04B37/026; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/124; C04B2237/125; C04B2237/126; C04B2237/127; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/345; C04B2237/348; C04B2237/36; C04B2237/365; C04B2237/368; C04B2237/40; C04B2237/405; C04B2237/406; C04B2237/407; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12611; Y10T428/31504; Y10T428/31826
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
139 words
An article consisting essentially of: (a) a ceramic substrate selected from the group consisting of aluminum oxide, silicon nitride, silicon carbide, and partially stabilized zirconia, (b) a member selected from the group consisting of metals and ceramics and, (c) a brazed joint bonding said member and said substrate, said braze being selected from the group consisting essentially of, in percent by weight, (1) from about 25% to about 29% Cu, from about 1% to about 3% Ti and the balance Ag, (2) from about 22% to about 26% Cu, from about 9% to about 16% In, from about 1% to about 3% Ti and the balance Ag, (3) from about 16% to about 20% Ni, from about 1% to about 3% Ti and the balance Au, and (4) from about 2% to about 5% Zr and the balance Cu.
Claim 2
Dependent Claim
139 words
An article consisting essentially of: (a) a ceramic substrate selected from the group consisting of aluminum oxide, silicon nitride, silicon carbide, and partially stabilized zirconia, (b) a member selected from the group consisting of metals and ceramics and, (c) a brazed joint bonding said member and said substrate, said braze being selected from the group consisting essentially of, in percent by weight, (1) from about 25% to about 29% Cu, from about 1% to about 3% Ti and the balance Ag, (2) from about 22% to about 26% Cu, from about 9% to about 16% In, from about 1% to about 3% Ti and the balance Ag, (3) from about 16% to about 20% Ni, from about 1% to about 3% Ti and the balance Au, and (4) from about 2% to about 5% Zr and the balance Cu.
Claim 3
Dependent Claim
28 words
An article according to claim 1 wherein the brazing alloy composition consists essentially of in percent by weight: about 27% Cu, about 3% Ti, and the balance Ag.
Claim 4
Dependent Claim
31 words
An article according to claim 1 wherein the brazing alloy composition consists essentially of in percent by weight: about 24% Cu, about 14% In, about 1.5% Ti and the balance Ag.
Claim 5
Dependent Claim
28 words
An article according to claim 1 wherein the brazing alloy composition consists essentially of in percent by weight about 18% Ni, about 1% Ti, and the balance Au.
Claim 6
Dependent Claim
25 words
An article according to claim 1 wherein the brazing alloy composition consists essentially of in percent by weight about 4% Zr and the balance Cu.
References Cited (Backward Citations)
GB512142A
Cited
US2851233A
Cited
US3373016A
Cited
US3455663A
Cited
US3438819A
Cited
US4338380A
Cited
US4075364A
Cited
US4182628A
Cited
GB2066291A
Cited
US4497875A
Cited
JPS6026633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-26 | 1989-11-25 | 1990-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-26 | 1993-11-25 | 1994-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-26 | 1997-11-25 | 1998-05-27 | $7700.00 | Window Closed / Lapsed |