US4217137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gold based alloy composition and brazing therewith, particularly for ceramic-metal seals in electrical feedthroughs
Assignee: Medtronic Inc
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Filing: 1979-02-26
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Granted: 1980-08-12
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Expires: 1999-02-26
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
2026-11-06 10:10
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3013; C; C22; C22C; C22C5/00; C22C5/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
An alloy particularly suitable for brazing and metallizing consisting, in addition to minor amounts of impurities and incidental elements if any, essentially of gold in a predominant amount, a minor amount of vanadium, a minor amount of a constituent selected from the group consisting of yttrium, scandium and mixtures thereof, and optionally including a minor amount of niobium.
Claim 2
Dependent Claim
58 words
An alloy particularly suitable for brazing and metallizing consisting, in addition to minor amounts of impurities and incidental elements if any, essentially of gold in a predominant amount, a minor amount of vanadium, a minor amount of a constituent selected from the group consisting of yttrium, scandium and mixtures thereof, and optionally including a minor amount of niobium.
Claim 3
Dependent Claim
65 words
An alloy according to claim 1 which 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 the constituent selected from the group consisting of yttrium, scandium, and mixtures thereof; from 0% up to about 3% niobium, the balance of the alloy being gold and impurities and incidental elements, if any.
Claim 4
Dependent Claim
19 words
An alloy according to claim 2 wherein the amount of the vanadium is from about 4% to about 5%.
Claim 5
Dependent Claim
18 words
An alloy according to claim 1 wherein the selected constituent is yttrium in an amount of about 0.02%.
Claim 6
Dependent Claim
14 words
An alloy according to claim 2 including niobium in an amount of about 0.5%.
Claim 7
Dependent Claim
34 words
The alloy according to claim 2 wherein the amount of the vanadium ranges from about 4% up to about 5% and the selected constituent ranges from about 0.008% up to about 0.02% in amount.
Claim 8
Dependent Claim
14 words
An alloy according to claim 6 including niobium in an amount of about 0.5%.
Claim 9
Dependent Claim
27 words
An alloy according to claim 2 wherein the amount of the vanadium is about 4-5% and the selected constituent is yttrium in an amount of about 0.02%.
Claim 10
Dependent Claim
14 words
An alloy according to claim 8 including niobium in an amount of about 0.5%.
Claim 11
Dependent Claim
64 words
A brazing alloy having a melting point in excess of about 1900° F. and capable of forming hermetic and corrosion resistant joints, the alloy consisting, in addition to impurities and incidental elements, essentially of gold in a major amount and the following constituents in minor amounts: vanadium, a constituent selected from the group consisting of yttrium, scandium, and mixtures thereof, and optionally including niobium.
Claim 12
Dependent Claim
64 words
A brazing alloy having a melting point in excess of about 1900° F. and capable of forming hermetic and corrosion resistant joints, the alloy consisting, in addition to impurities and incidental elements, essentially of gold in a major amount and the following constituents in minor amounts: vanadium, a constituent selected from the group consisting of yttrium, scandium, and mixtures thereof, and optionally including niobium.
References Cited (Backward Citations)
US1107181A
Cited
US1107180A
Cited
DE863714C
Cited
US3001269A
Cited
US3063144A
Cited
GB920471A
Cited
US3065533A
Cited
GB936264A
Cited
GB937947A
Cited
DE1235714B
Cited
DE1608161C
Cited
US3577233A
Cited
US3616406A
Cited
US3846125A
Cited
US3940050A
Cited
US4014690A
Cited
US4152540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-12 | 1984-02-11 | 1984-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-12 | 1988-02-11 | 1988-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-12 | 1992-02-11 | 1992-08-12 | $7700.00 | Window Closed / Lapsed |