US4180700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy composition and brazing therewith, particularly for _ceramic-metal seals in electrical feedthroughs
Assignee: Medtronic Inc
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Filing: 1978-03-13
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Granted: 1979-12-25
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Expires: 1998-03-13
Abstract
Abstract New alloys containing gold, vanadium, yttrium and/or scandium, optionally including niobium. The alloys are particularly suitable for brazing and for metallizing, most particularly for brazing hermetic ceramic-metal seals. Unique brazing structures and methods are also disclosed.
Inventors
- 👤 Robert E. Kraska
- 👤 Joseph F. Lessar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:42
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/372; A61N1/375; A61N1/3752; A61N1/3754; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3013; C; C22; C22C; C22C5/00; C22C5/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
44 words
An article comprised of at least two members joined together by a thin alloy layer consisting essentially of vanadium, a constituent selected from the group consisting of yttrium, scandium, and mixtures thereof, the balance being gold and minor amounts of incidental impurities, if any.
Claim 2
Dependent Claim
44 words
An article comprised of at least two members joined together by a thin alloy layer consisting essentially of vanadium, a constituent selected from the group consisting of yttrium, scandium, and mixtures thereof, the balance being gold and minor amounts of incidental impurities, if any.
Claim 3
Dependent Claim
23 words
The article of claim 1 wherein the alloy additionally includes niobium in an amount less than about 3% on an atomic percentage basis.
Claim 4
Dependent Claim
25 words
The article of claim 1 wherein the alloy consists essentially of minor amounts of vanadium and the selected constituent, the gold being predominant in amount.
Claim 5
Dependent Claim
55 words
The article of claim 1 wherein the alloy consists on an atomic percentage basis essentially of from about 4% up to about 15% vanadium, about 0.008% up to about 0.2% of a constituent selected from the group consisting of yttrium, scandium, and mixtures thereof, 0% up to about 3% niobium, the balance being essentially gold.
Claim 6
Dependent Claim
29 words
The article of claim 4 wherein the amount of vanadium ranges about 4% up to about 5% and the selected constituent ranges from about 0.008% up to about 0.02%.
Claim 7
Dependent Claim
15 words
The article of claim 5 wherein the amount of the selected constituent is about 0.02%.
Claim 8
Dependent Claim
11 words
The article of claim 6 wherein the selected constituent is yttrium.
Claim 9
Dependent Claim
79 words
An insulated coaxial lead-in for making electrical connection through a wall-like member, the lead-in comprising a central conductor and an outer sheath member, a generally cylindrical body of rigid insulating material separating the conductor and sheath and hermetically sealed to each by a first and second seal respectively, the seals comprising brazed joints formed of an alloy consisting essentially of vanadium, a constituent selected from the group consisting of yttrium, scandium, and mixtures thereof, the balance being essentially gold.
Claim 10
Dependent Claim
79 words
An insulated coaxial lead-in for making electrical connection through a wall-like member, the lead-in comprising a central conductor and an outer sheath member, a generally cylindrical body of rigid insulating material separating the conductor and sheath and hermetically sealed to each by a first and second seal respectively, the seals comprising brazed joints formed of an alloy consisting essentially of vanadium, a constituent selected from the group consisting of yttrium, scandium, and mixtures thereof, the balance being essentially gold.
Claim 11
Dependent Claim
23 words
The article of claim 8 wherein the alloy additionally includes niobium in an amount less than about 3%, on an atomic percentage basis.
Claim 12
Dependent Claim
25 words
The article of claim 8 wherein the alloy consists essentially of minor amounts of vanadium and the selected constituent, the gold being predominant in amount.
Claim 13
Dependent Claim
37 words
The article of claim 8 wherein the central conductor includes a peripheral shoulder located in the area immediately above the brazed joint between said conductor and said body of rigid insulating material and overlapping the joint area.
Claim 14
Dependent Claim
57 words
The article of claim 8 wherein the alloy consists on an atomic percentage basis essentially of from about 4% up to about 15% vanadium, from about 0.008% up to about 0.2% of a constituent selected from the group consisting of yttrium, scandium, and mixtures thereof, from 0% up to about 3% niobium, the balance being essentially gold.
Claim 15
Dependent Claim
30 words
The article of claim 12 wherein the amount of vanadium ranges from about 4% up to about 5% and the selected constitutent ranges from about 0.008% up to about 0.02%.
Claim 16
Dependent Claim
14 words
The article of claim 13 wherein the amount of selected constituent is about 0.02%.
Claim 17
Dependent Claim
11 words
The article of claim 14 wherein the selected constituent is yttrium.
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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) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |