Patent US4692385A successfully refreshed from Google Patents.
US4692385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triplex article
Assignee: MATERIALS DEVELOPMENT Corp A CORP OF MA
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Filing: 1986-04-14
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Granted: 1987-09-08
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Expires: 2006-04-14
Abstract
Abstract A coated article and method for manufacturing the same wherein an alloy substrate of iron, nickel, cobalt, or titanium base has a diffusion layer formed thereon of an intermetallic boride of the substrate alloy. A coating is subsequently deposited on the diffusion layer, which coating is a refractory, ceramic or intermetallic compound having desired wear and/or corrosion resistant properties superior to those of the substrate.
Inventors
- 👤 Philip C. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:54
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/80; C23C28/00
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
69 words
A coated article comprising an alloy substrate of an alloy selected from the group consisting of iron, nickel, cobalt and titanium base alloys, a diffusion layer formed thereon comprising an intermetallic boride of the substrate alloy, a coating on said layer of a material selected from the group consisting of refractory, ceramic and intermetallic compounds having desired wear and/or corrosion resistent properties superior to those of said alloy substrate.
Claim 2
Dependent Claim
69 words
A coated article comprising an alloy substrate of an alloy selected from the group consisting of iron, nickel, cobalt and titanium base alloys, a diffusion layer formed thereon comprising an intermetallic boride of the substrate alloy, a coating on said layer of a material selected from the group consisting of refractory, ceramic and intermetallic compounds having desired wear and/or corrosion resistent properties superior to those of said alloy substrate.
Claim 3
Dependent Claim
28 words
The article of claim 1 wherein said coating has a coefficient of thermal expansion that is closer to that of said diffusion layer than that of said substrate.
Claim 4
Dependent Claim
22 words
The article of claim 1 wherein said coating has a coefficient of thermal expansion within +/-30% of that of said diffusion layer.
Claim 5
Dependent Claim
22 words
The article of claim 1 wherein said coating has a coefficient of thermal expansion within +/-15% of that of said diffusion layer.
Claim 6
Dependent Claim
34 words
The article of claim 1 wherein said coating is a material selected from the group consisting of TiB 2 , Al 2 O 3 , TiC, Cr 3 C 2 , VC and TiN.
Claim 7
Dependent Claim
12 words
The article of claim 1 wherein said coating is TiB 2 .
Claim 8
Dependent Claim
57 words
A coated article comprising an alloy substrate of an iron-base alloy, a diffusion layer formed thereon comprising an intermetallic boride of the substrate alloy, a coating on said layer of a material selected from the group consisting of refractory, ceramic and intermetallic compounds having desired wear and/or corrosion resistant properties superior to those of said alloy substrate.
Claim 9
Dependent Claim
57 words
A coated article comprising an alloy substrate of an iron-base alloy, a diffusion layer formed thereon comprising an intermetallic boride of the substrate alloy, a coating on said layer of a material selected from the group consisting of refractory, ceramic and intermetallic compounds having desired wear and/or corrosion resistant properties superior to those of said alloy substrate.
Claim 10
Dependent Claim
28 words
The article of claim 7 wherein said coating has a coefficient of thermal expansion that is closer to that of said diffusion layer than that of said substrate.
Claim 11
Dependent Claim
22 words
The article of claim 7 where said coating has a coefficient of thermal expansion within +/-30% of that of said diffusion layer.
Claim 12
Dependent Claim
22 words
The article of claim 7 wherein said coating has a coefficient of thermal expansion within +/-15% of that of said diffusion layer.
Claim 13
Dependent Claim
34 words
The article of claim 7 wherein coating is a material selected from the group consisting of TiB 2 , Al 2 O 3 , TiC, Cr 3 , C 2 , VC and TiN.
Claim 14
Dependent Claim
13 words
The coated article of claim 7 wherein said coating is TiB 2 .
Claim 15
Dependent Claim
57 words
A coated article comprising an alloy substrate of a nickel-base alloy, a diffusion layer formed thereon comprising an intermetallic boride of the substrate alloy, a coating on said layer of a material selected from the group consisting of refractory, ceramic and intermetallic compounds having desired wear and/or corrosion resistant properties superior to those of said alloy substrate.
Claim 16
Dependent Claim
57 words
A coated article comprising an alloy substrate of a nickel-base alloy, a diffusion layer formed thereon comprising an intermetallic boride of the substrate alloy, a coating on said layer of a material selected from the group consisting of refractory, ceramic and intermetallic compounds having desired wear and/or corrosion resistant properties superior to those of said alloy substrate.
Claim 17
Dependent Claim
28 words
The article of claim 13 wherein said coating has a coefficient of thermal expansion that is closer to that of said diffusion layer than that of said substrate.
Claim 18
Dependent Claim
22 words
The article of claim 13 wherein said coating has a coefficient of thermal expansion within +/-30% of that of said diffusion layer.
Claim 19
Dependent Claim
22 words
The article of claim 13 wherein said coating has a coefficient of thermal expansion within +/-15% of that of said diffusion layer.
Claim 20
Dependent Claim
34 words
The article of claim 13 wherein said coating is a material selected from the group consisting of TiB 2 , Al 2 O 3 , Tic, Cr 3 C 2 , VC and TiN.
Claim 21
Dependent Claim
12 words
The article of claim 13 wherein said coating is TiB 2 .
Claim 22
Dependent Claim
57 words
A coated article comprising an alloy substrate of a cobalt-base alloy, a diffusion layer formed thereon comprising an intermetallic boride of the substrate alloy; a coating on said layer of a material selected from the group consisting of refractory, ceramic and intermetallic compounds having desired wear and/or corrosion resistant properties superior to those of said alloy substrate.
Claim 23
Dependent Claim
57 words
A coated article comprising an alloy substrate of a cobalt-base alloy, a diffusion layer formed thereon comprising an intermetallic boride of the substrate alloy; a coating on said layer of a material selected from the group consisting of refractory, ceramic and intermetallic compounds having desired wear and/or corrosion resistant properties superior to those of said alloy substrate.
Claim 24
Dependent Claim
28 words
The article of claim 19 wherein said coating has a coefficient of thermal expansion that is closer to that of said diffusion layer than that of said substrate.
Claim 25
Dependent Claim
22 words
The article of claim 19 wherein said coating has a coefficient of thermal expansion within +/-30% of that of said diffusion layer.
Claim 26
Dependent Claim
22 words
The article of claim 19 wherein said coating has a coefficient of thermal expansion within +/-15% of that of said diffusion layer.
Claim 27
Dependent Claim
34 words
The article of claims 19 wherein said coating is a material selected from the group consisting of TiB 2 , Al 2 O 3 , TiC, Cr 3 C 2 , VC and TiN.
Claim 28
Dependent Claim
12 words
The article of claim 19 wherein said coating is TiB 2 .
Claim 29
Dependent Claim
51 words
A coated article comprising a titanimum base alloy substrate, a diffusion layer formed thereon comprising an intermetallic titanium boride compound, a coating on said layer of a material selected from the group consisting of refractory, ceramic and intermetallic compounds having desired errosion and abrasion-resistant properties superior to those of said substrate.
Claim 30
Dependent Claim
51 words
A coated article comprising a titanimum base alloy substrate, a diffusion layer formed thereon comprising an intermetallic titanium boride compound, a coating on said layer of a material selected from the group consisting of refractory, ceramic and intermetallic compounds having desired errosion and abrasion-resistant properties superior to those of said substrate.
Claim 31
Dependent Claim
12 words
The article of claim 25 wherein said coating is TiB 2 .
Claim 32
Dependent Claim
14 words
The article of claim 25 wherein said coating is thicker than said diffusion layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |