US4190442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame spray powder mix
Assignee: Eutectic Corp
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Filing: 1978-06-15
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Granted: 1980-02-26
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Expires: 1998-06-15
Abstract
Abstract A flame spray powder mix or blend is provided for producing metal coatings on metal substrates, such as ferrous metal substrates, e.g., steel, cast iron, among other metal substrates, the powder mix comprising agglomerates of at least one oxidizable metal, e.g., aluminum, homogeneously mixed or blended with a coating metal powder, such as nickel powder. The coating produced is characterized by a strong bond and also being substantially low in dispersed oxides.
Inventors
- 👤 Mahesh S. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:52
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/16; B05B7/20; B05B7/201; B05B7/205; B22; B22F; B22F1/00; B22F1/09; B22F1/14; B22F1/148; C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; C23C4/067; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/937
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A flame spray powder mixture formed of agglomerates of an oxidizable metal separately mixed with a coating metal powder, the average size of said agglomerates and said coating metal powder ranging from about 20 to 140 microns, said agglomerates being made up of fine particles of said oxidizable metal of average size less than about 20 microns bound together in a matrix of a fugitive binder, said oxidizable metal being characterized by a negative free energy of formation of the oxide of at least 30,000 calories per gram atom of oxygen referred to 25° C. and a melting point above 350° C., the composition of said powder mixture ranging from about 2% to 15% by weight of said oxidizable metal, with substantially the balance said coating metal powder.
Claim 2
Dependent Claim
128 words
A flame spray powder mixture formed of agglomerates of an oxidizable metal separately mixed with a coating metal powder, the average size of said agglomerates and said coating metal powder ranging from about 20 to 140 microns, said agglomerates being made up of fine particles of said oxidizable metal of average size less than about 20 microns bound together in a matrix of a fugitive binder, said oxidizable metal being characterized by a negative free energy of formation of the oxide of at least 30,000 calories per gram atom of oxygen referred to 25° C. and a melting point above 350° C., the composition of said powder mixture ranging from about 2% to 15% by weight of said oxidizable metal, with substantially the balance said coating metal powder.
Claim 3
Dependent Claim
26 words
The flame spray powder mixture of claim 1, wherein the amount of said oxidizable metal ranges from about 2% to 10% by weight of the mixture.
Claim 4
Dependent Claim
33 words
The flame spray powder mixture as in claim 1, wherein the coating metal powder is selected from the group consisting of Ni, Co, Fe, Cu, nickel-base, cobalt-base, iron-base, copper-base alloys, and aluminum bronze.
Claim 5
Dependent Claim
135 words
A flame spray powder mixture formed of agglomerates of an oxidizable metal separately mixed with a coating metal powder, said oxidizable metal being at least one metal selected from the group consisting of Cu, Al, Be, Mg, Zn, Sr, Ba, Sc, Y, La, Sb, Si, Ti, Zr, Hf, V, Nb, Ta, Type 4f rare earth metals, Cr, Mo, W, Fe, Ni, and Co, said agglomerates being made of fine particles of said oxidizable metal of average size less than about 20 microns bound together in a matrix of a fugitive binder, the average size of said agglomerates and said coating metal powder ranging from about 20 to 140 microns, the composition of said powder mixture ranging from about 2% to 15% by weight of said oxidizable metal, with substantially the balance said coating metal powder.
Claim 6
Dependent Claim
135 words
A flame spray powder mixture formed of agglomerates of an oxidizable metal separately mixed with a coating metal powder, said oxidizable metal being at least one metal selected from the group consisting of Cu, Al, Be, Mg, Zn, Sr, Ba, Sc, Y, La, Sb, Si, Ti, Zr, Hf, V, Nb, Ta, Type 4f rare earth metals, Cr, Mo, W, Fe, Ni, and Co, said agglomerates being made of fine particles of said oxidizable metal of average size less than about 20 microns bound together in a matrix of a fugitive binder, the average size of said agglomerates and said coating metal powder ranging from about 20 to 140 microns, the composition of said powder mixture ranging from about 2% to 15% by weight of said oxidizable metal, with substantially the balance said coating metal powder.
Claim 7
Dependent Claim
26 words
The flame spray powder mixture of claim 4, wherein the amount of said oxidizable metal ranges from about 2% to 10% by weight of the mixture.
Claim 8
Dependent Claim
32 words
The flame spray powder mixture of claim 4, wherein the coating metal powder is selected from the group consisting of Ni, Co, Fe, Cu, nickel-base, cobalt-base, iron-base, copper-base alloys, and aluminum bronze.
Claim 9
Dependent Claim
86 words
A flame spray powder mixture formed of agglomerates of aluminum separately mixed with nickel powder, the average size of said agglomerates and said nickel powder ranging from about 20 to 140 microns, said agglomerates being made up of fine particles of said aluminum of average size less than about 20 microns bound together in a matrix of a fugitive binder, the composition of said powder mixture ranging from about 2% to 15% by weight of said aluminum, with substantially the balance of said mixture nickel powder.
Claim 10
Dependent Claim
86 words
A flame spray powder mixture formed of agglomerates of aluminum separately mixed with nickel powder, the average size of said agglomerates and said nickel powder ranging from about 20 to 140 microns, said agglomerates being made up of fine particles of said aluminum of average size less than about 20 microns bound together in a matrix of a fugitive binder, the composition of said powder mixture ranging from about 2% to 15% by weight of said aluminum, with substantially the balance of said mixture nickel powder.
Claim 11
Dependent Claim
24 words
The flame spray powder mixture of claim 7, wherein the amount of aluminum ranges from about 2% to 10% by weight of the mixture.
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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) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |