US4525433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite material
Assignee: Johnson Matthey PLC
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Filing: 1982-09-08
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Granted: 1985-06-25
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Expires: 2002-09-08
Abstract
Abstract Composite materials comprising, inter alia, a dispersion strengthened platinum-palladium-dispersion strengthened platinum sandwich have comparable properties of strength, ductility and electrical conductivity to the rhodium-platinum alloys used for fibre-glass bushings in the glass industry.
Inventors
- 👤 Alan E. Heywood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:05
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/08; C03B37/095; B; B32; B32B; B32B15/00; B32B15/01; B32B15/018; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12875; Y10T428/12889
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
114 words
A composite material comprising two outer layers comprising a platinum group metal or alloy thereof and an inner layer disposed between and bonded to the outer layers, at least one of the outer layers comprising a member selected from the group consisting of a dispersion strengthened platinum group metal and a dispersion strengthened alloy containing a major proportion of a platinum group metal, and the inner layer comprising a noble metal or noble metal alloy which is dissimilar to the metal or alloy of the said outer layers, said inner layer comprising a member selected from the group consisting of metallic palladium, dispersion strengthened palladium, a palladium alloy and a dispersion strengthened palladium alloy.
Claim 2
Dependent Claim
114 words
A composite material comprising two outer layers comprising a platinum group metal or alloy thereof and an inner layer disposed between and bonded to the outer layers, at least one of the outer layers comprising a member selected from the group consisting of a dispersion strengthened platinum group metal and a dispersion strengthened alloy containing a major proportion of a platinum group metal, and the inner layer comprising a noble metal or noble metal alloy which is dissimilar to the metal or alloy of the said outer layers, said inner layer comprising a member selected from the group consisting of metallic palladium, dispersion strengthened palladium, a palladium alloy and a dispersion strengthened palladium alloy.
Claim 3
Dependent Claim
49 words
A composite material according to claim 1 wherein the other outer layer comprises a metallic material selected from the group consisting of platinum metal, dispersion strengthened platinum, a platinum alloy, a dispersion strengthened platinum alloy, a dispersion strengthened gold/platinum alloy, a gold/platinum alloy and a dispersion strengthened rhodium/platinum alloy.
Claim 4
Dependent Claim
20 words
A composite material according to claim 2 wherein the dispersion strengthened gold/platinum alloy contains 2 to 10 wt % gold.
Claim 5
Dependent Claim
20 words
A composite material according to claim 3 wherein the dispersion strengthened gold/Platinum alloy contains 3 to 8 wt % gold.
Claim 6
Dependent Claim
20 words
A composite material according to claim 2 wherein the dispersion strengthened rhodium/platinum alloy contains up to 20 wt % rhodium.
Claim 7
Dependent Claim
20 words
A composite material according to claim 5 wherein the dispersion strengthened rhodium/platinum alloy contains 2 to 10 wt % rhodium.
Claim 8
Dependent Claim
18 words
A composite material according to claim 1 wherein the inner layer contains up to 40 wt % platinum.
Claim 9
Dependent Claim
16 words
A composite material according to claim 1 wherein adjacent layers are interfacially bonded by diffusion bonding.
Claim 10
Dependent Claim
18 words
A composite material according to claim 8 wherein edges of the composite material are welded by fusion welding.
Claim 11
Dependent Claim
31 words
A die-plate for use as the base plate of a bushing for holding molten glass in the manufacture of glass fibre, the die-plate comprising a composite material according to claim 1.
Claim 12
Dependent Claim
18 words
A crucible comprising an alloy according to claim 1 and used in the preparation of X-ray fluourescence samples.
Claim 13
Dependent Claim
18 words
A mould comprising an alloy according to claim 1 and used in the preparation of X-ray fluourescence samples.
Claim 14
Dependent Claim
11 words
A bursting disc comprising a material as claimed in claim 1.
Claim 15
Dependent Claim
163 words
A composite material comprising two outer layers and an inner layer disposed between and bonded to the outer layers, one of the outer layers comprising a member selected from the group consisting of a dispersion strengthened platinum group metal and a dispersion strengthened alloy containing a major proportion of a platinum group metal, the other outer layer comprising a metallic material selected from the group consisting of platinum metal, dispersion strengthened platinum, a platinum alloy, a dispersion strengthened platinum alloy, a dispersion strengthened platinum alloy, a dispersion strengthened gold/platinum alloy containing 2 to 10 wt % gold, a gold/platinum alloy and a dispersion strengthened rhodium/platinum alloy containing up to 20 wt % rhodium, and the inner layer comprising a noble metal or noble metal alloy which is dissimilar to the metal or alloy of said outer layers, said inner layer comprising a member selected from the group consisting of metallic palladium, dispersion strengthened palladium, a palladium alloy and a dispersion strengthened palladium alloy.
Claim 16
Dependent Claim
163 words
A composite material comprising two outer layers and an inner layer disposed between and bonded to the outer layers, one of the outer layers comprising a member selected from the group consisting of a dispersion strengthened platinum group metal and a dispersion strengthened alloy containing a major proportion of a platinum group metal, the other outer layer comprising a metallic material selected from the group consisting of platinum metal, dispersion strengthened platinum, a platinum alloy, a dispersion strengthened platinum alloy, a dispersion strengthened platinum alloy, a dispersion strengthened gold/platinum alloy containing 2 to 10 wt % gold, a gold/platinum alloy and a dispersion strengthened rhodium/platinum alloy containing up to 20 wt % rhodium, and the inner layer comprising a noble metal or noble metal alloy which is dissimilar to the metal or alloy of said outer layers, said inner layer comprising a member selected from the group consisting of metallic palladium, dispersion strengthened palladium, a palladium alloy and a dispersion strengthened palladium alloy.
Claim 17
Dependent Claim
39 words
A composite material according to claim 14 wherein the dispersion strengthened platinum alloy is selected from the group consisting of dispersion strengthened gold/platinum alloy containing 3-8 wt % gold and dispersion strengthened rhodium/platinum alloy containing 2-20 wt % rhodium.
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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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |