Patent US4157768A successfully refreshed from Google Patents.
US4011981A
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Process for bonding titanium, tantalum, and alloys thereof
Assignee: Olin Corp
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Filing: 1975-03-27
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Granted: 1977-03-15
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Expires: 1995-03-27
Abstract
Abstract A method of bonding film-forming metals and their alloys has been developed. The method comprises applying a first coating of a metal, compound, or alloy of the platinum metal group to the film-forming metal. A second coating of copper is then applied to the first coating. A second metal, such as steel, can then be readily soldered to the copper coating to form a strong, durable bond.
Inventors
- 👤 Peter A. Danna
- 👤 Richard A. Holcomb
- 👤 Richard J. Roethlein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:12
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/001; B23K35/005; B23K1/00; B23K1/19
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
87 words
A process for bonding a first film-forming metal selected from the group consisting of titanium, tantalum, zirconium, niobium, tungsten and alloys thereof to a second metal which comprises: a. applying a first coating of a platinum metal component selected from the group consisting of platinum group metals, platinum group metal compounds, and mixtures thereof to said first film-forming metal, b. applying a second coating of copper to said first coating, and c. soldering said second metal to said second coating of copper on said first film-forming metal.
Claim 2
Dependent Claim
87 words
A process for bonding a first film-forming metal selected from the group consisting of titanium, tantalum, zirconium, niobium, tungsten and alloys thereof to a second metal which comprises: a. applying a first coating of a platinum metal component selected from the group consisting of platinum group metals, platinum group metal compounds, and mixtures thereof to said first film-forming metal, b. applying a second coating of copper to said first coating, and c. soldering said second metal to said second coating of copper on said first film-forming metal.
Claim 3
Dependent Claim
28 words
The process of claim 1 in which said platinum group metal is selected from the group consisting of platinum, rhodium, iridium, ruthenium, osmium, and palladium, and mixtures thereof.
Claim 4
Dependent Claim
33 words
The process of claim 1 in which said platinum metal component is a platinum metal compound selected from the group consisting of carbides, silicides, oxides, nitrides, borides, phosphides, halides, aluminides, and mixtures thereof.
Claim 5
Dependent Claim
16 words
The process of claim 3 in which said platinum metal compounds are oxides, or mixtures thereof.
Claim 6
Dependent Claim
31 words
The process of claim 1 in which said second metal is selected from the group consisting of steel, copper, lead, tin, silver, brass, stainless steel, cadmium, and a platinum group metal.
Claim 7
Dependent Claim
23 words
The process of claim 5 in which said second metal is selected from the group consisting of steel, copper, silver, and stainless steel.
Claim 8
Dependent Claim
25 words
The process of claim 6 in which said first film-forming metal is selected from the group consisting of titanium, titanium alloys, tantalum, and tantalum alloys.
Claim 9
Dependent Claim
33 words
The process of claim 7 in which the soldering of said second metal to said second coating of copper is conducted in the temperature range of from about 350° to about 550° F.
Claim 10
Dependent Claim
24 words
The process of claim 8 in which said platinum group metal is selected from the group consisting of platinum, iridium, ruthenium, and mixtures thereof.
Claim 11
Dependent Claim
25 words
The process of claim 9 in which said first film-forming metal is titanium and said platinum group metal is a mixture of platinum and iridium.
Claim 12
Dependent Claim
24 words
The process of claim 7 in which said first film-forming metal is titanium having an oxide layer applied prior to applying said first coating.
Claim 13
Dependent Claim
87 words
A process for bonding a first film-forming metal selected from the group consisting of titanium, tantalum, zirconium, niobium, tungsten and alloys thereof having a first coating selected from the group consisting of platinum group metals, platinum group metal compounds, and mixtures thereof to a second metal which comprises: a. applying a second coating of copper to said first coating, and b. soldering said second metal to said second coating of copper on said first film-forming metal at a temperature of from about 350° to about 550° F.
Claim 14
Dependent Claim
87 words
A process for bonding a first film-forming metal selected from the group consisting of titanium, tantalum, zirconium, niobium, tungsten and alloys thereof having a first coating selected from the group consisting of platinum group metals, platinum group metal compounds, and mixtures thereof to a second metal which comprises: a. applying a second coating of copper to said first coating, and b. soldering said second metal to said second coating of copper on said first film-forming metal at a temperature of from about 350° to about 550° F.
Claim 15
Dependent Claim
33 words
The process of claim 12 in which said first coating is a platinum group metal compound selected from the group consisting of carbides, silicides, oxides, nitrides, borides, phosphides, halides, aluminides, and mixtures thereof.
Claim 16
Dependent Claim
17 words
The process of claim 13 in which said platinum group metal compounds are oxides or mixtures thereof.
Claim 17
Dependent Claim
15 words
The process of claim 14 in which said platinum group metal oxides are ruthenium oxides.
Claim 18
Dependent Claim
13 words
The process of claim 15 in which said first film-forming metal is titanium.
Claim 19
Dependent Claim
27 words
The process of claim 12 in which said platinum group metal is selected from the group consisting of platinum, rhodium, iridium, ruthenium, osmium, palladium, and mixtures thereof.
Claim 20
Dependent Claim
31 words
The process of claim 12 in which said second metal is selected from the group consisting of steel, copper, a platinum group metal, silver, tin, lead, brass, cadmium, and stainless steel.
Claim 21
Dependent Claim
23 words
The process of claim 18 in which said second metal is selected from the group consisting of steel, copper, silver, and stainless steel.
Claim 22
Dependent Claim
22 words
The process of claim 19 in which said soldering is conducted at a temperature of from about 375° to about 525° F.
Claim 23
Dependent Claim
25 words
The process of claim 20 in which said platinum group metal is selected from the group consisting of platinum, iridium, and ruthenium, and mixtures thereof.
Claim 24
Dependent Claim
18 words
The process of claim 21 in which said platinum group metal is a mixture of platinum and iridium.
Claim 25
Dependent Claim
25 words
The process of claim 12 in which said first film-forming metal is selected from the group consisting of titanium, titanium alloys, tantalum and tantalum alloys.
References Cited (Backward Citations)
US3006069A
Cited
US3107756A
Cited
US3339267A
Cited
US3497425A
Cited
US3393446A
Cited
US3862488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |