Patent US4526618A successfully refreshed from Google Patents.
US4526618A
Expired / Lapsed
US
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Abrasion resistant coating composition
Assignee: Praxair ST Technology Inc
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Filing: 1983-10-18
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Granted: 1985-07-02
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Expires: 2003-10-18
Abstract
Abstract A coating composition applied to a substrate by a thermal spray process which comprises tungsten carbide and a boron-containing alloy or a mixture of alloys with a total composition of from about 6.0 to 18.0 weight percent boron, 0 to 6 weight percent silicon, 0 to 20 weight percent chromium, 0 to 5 weight percent iron and the balance nickel; the tungsten carbide comprising about 78 to 88 weight percent of the entire composition.
Inventors
- 👤 Madapusi K. Keshavan
- 👤 Merle H. Weatherly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:03
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
A coating composition applied to a substrate by a thermal spray process which comprises tungsten carbide and a boron containing alloy or a mixture of alloys with a total composition of from about 6.0 to 18.0 weight percent boron, 0 to 6 weight percent silicon, 0 to 20 weight percent chromium, 0 to 5 weight percent iron and the balance nickel; the tungsten carbide comprising about 78 to 88 weight percent of the entire composition.
Claim 2
Dependent Claim
75 words
A coating composition applied to a substrate by a thermal spray process which comprises tungsten carbide and a boron containing alloy or a mixture of alloys with a total composition of from about 6.0 to 18.0 weight percent boron, 0 to 6 weight percent silicon, 0 to 20 weight percent chromium, 0 to 5 weight percent iron and the balance nickel; the tungsten carbide comprising about 78 to 88 weight percent of the entire composition.
Claim 3
Dependent Claim
48 words
A coating composition according to claim 1 wherein the substrate is a metallic compound selected from the group consisting of steel, stainless steel, iron base alloys, nickel, nickel base alloys, cobalt, cobalt base alloys, chromium, chromium base alloys, titanium, titanium base alloys, refractory metal and refractory-metal base alloys.
Claim 4
Dependent Claim
23 words
A coating composition according to claim 1 wherein the substrate is a non-metallic compound selected from the group consisting of carbon and graphite.
Claim 5
Dependent Claim
64 words
A powder composition for depositing an abrasion resistant coating onto a substrate comprising from about 78 to 88 weight percent tungsten carbide and alloy or a mixture of alloys with a total composition of from about 6.0 to 18.0 weight percent boron, 0 to 6 weight percent silicon, 0 to 20 weight percent chromium, 0 to 5 weight percent iron and the balance nickel.
Claim 6
Dependent Claim
64 words
A powder composition for depositing an abrasion resistant coating onto a substrate comprising from about 78 to 88 weight percent tungsten carbide and alloy or a mixture of alloys with a total composition of from about 6.0 to 18.0 weight percent boron, 0 to 6 weight percent silicon, 0 to 20 weight percent chromium, 0 to 5 weight percent iron and the balance nickel.
References Cited (Backward Citations)
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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) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |