US4561892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon-rich alloy coatings
Assignee: Stoody Co
•
Filing: 1984-06-05
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Granted: 1985-12-31
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Expires: 2004-06-05
Abstract
Abstract Disclosed is a coated substrate article coated with an alloy powder containing, in weight percent, 7 to 19 silicon, up to 5 copper balance nickel, cobalt and/or iron plus impurities. The articles may be coated by a variety of spray coating processes; however, plasma spray coating is preferred. The coated article is especially suited for use in severe conditions of wet corrosion.
Inventors
- 👤 Prabhat Kumar
- 👤 Vidhu Anand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:27
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
43 words
A metal alloy powder, substantially less than 75 microns in particle size, for use in spray coating processes, said alloy consisting essentially of, in weight percent, 7 to 19 silicon, up to 5 copper, 76 to 93 total nickel and cobalt, plus impurities.
Claim 2
Dependent Claim
43 words
A metal alloy powder, substantially less than 75 microns in particle size, for use in spray coating processes, said alloy consisting essentially of, in weight percent, 7 to 19 silicon, up to 5 copper, 76 to 93 total nickel and cobalt, plus impurities.
Claim 3
Dependent Claim
20 words
The metal powder of claim 1 produced by one process selected from the group gas atomization and water atomization processes.
Claim 4
Dependent Claim
17 words
The metal powder of claim 1 produced by blending alloyed or unalloyed powders to obtain desired composition.
Claim 5
Dependent Claim
23 words
The metal powder of claim 1 deposited on a substrate article by a method selected from the group electric arc and flame spraying.
Claim 6
Dependent Claim
38 words
The method of coating a substrate article including the steps, producing the metal powder of claim 1, spray coating said article with said powder, characterized by heat treating the coated article to promote oxidation of the resultant deposit.
Claim 7
Dependent Claim
28 words
An article of manufacture comprising a substrate article coated by a method selected from the group electric arc and flame spraying with the metal powder of claim 1.
Claim 8
Dependent Claim
12 words
The article of claim 6 wherein the coating method is plasma spraying.
Claim 9
Dependent Claim
15 words
The article of claim 6, wherein the coating method is combustible gas-oxygen flame spraying system.
Claim 10
Dependent Claim
40 words
A metal alloy powder, substantially less than 75 microns in particle size, for use in spray coating processes, said alloy consisting essentially of, in weight percent, 7 to 19 silicon, up to 5 copper, 76 to 93 nickel, plus impurities.
Claim 11
Dependent Claim
40 words
A metal alloy powder, substantially less than 75 microns in particle size, for use in spray coating processes, said alloy consisting essentially of, in weight percent, 7 to 19 silicon, up to 5 copper, 76 to 93 nickel, plus impurities.
Claim 12
Dependent Claim
40 words
A metal alloy powder, substantially less than 75 microns in particle size, for use in spray coating processes, said alloy consisting essentially of, in weight percent, 7 to 19 silicon, up to 5 copper, 76 to 93 cobalt, plus impurities.
Claim 13
Dependent Claim
40 words
A metal alloy powder, substantially less than 75 microns in particle size, for use in spray coating processes, said alloy consisting essentially of, in weight percent, 7 to 19 silicon, up to 5 copper, 76 to 93 cobalt, plus impurities.
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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) | 1988-12-30 | 1989-07-01 | 1989-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-30 | 1993-07-01 | 1993-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-30 | 1997-07-01 | 1997-12-31 | $7700.00 | Window Closed / Lapsed |