US4591535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 02:55
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.
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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) | 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 |