US4141743A
Expired / Lapsed
US
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Thermal spray powdered composite
Assignee: BAY STATE/STERLING Inc
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Filing: 1977-10-31
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Granted: 1979-02-27
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Expires: 1997-10-31
Abstract
Abstract A composite powder suitable for use in thermal spray applications as a wear and/or corrosion resistant coating comprising chromic oxide, magnesium oxide, iron oxide, titanium oxide, and aluminum oxide.
Inventors
- 👤 Donald C. Grubba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:59
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C23; C23C; C23C4/00; C23C4/04; C23C4/10; C23C4/11; Y; Y10; Y10S; Y10S417/00; Y10S417/01; Y10S417/90
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
A complexed chromic oxide composite powder consisting essentially of, by weight, about 40% to 50% Cr 2 O 3 , about 1 to 10% MgO, about 2 to 10% Fe 2 O 3 , about 1 to 10% TiO 2 , and about 5 to 40% Al 2 O 3 , and SiO 2 in amounts up to about 8%, said powder including a glassy phase and providing a refractory coating which contains a significant glassy phase and has a Rockwell 15N scale hardness reading in the range of about 84 to 87.
Claim 2
Dependent Claim
93 words
A complexed chromic oxide composite powder consisting essentially of, by weight, about 40% to 50% Cr 2 O 3 , about 1 to 10% MgO, about 2 to 10% Fe 2 O 3 , about 1 to 10% TiO 2 , and about 5 to 40% Al 2 O 3 , and SiO 2 in amounts up to about 8%, said powder including a glassy phase and providing a refractory coating which contains a significant glassy phase and has a Rockwell 15N scale hardness reading in the range of about 84 to 87.
Claim 3
Dependent Claim
25 words
A composite powder according to claim 1 which contains, in addition, at least one material selected from the group consisting of ZrO 2 and CaO.
Claim 4
Dependent Claim
20 words
A composite powder according to claim 2, in which the ZrO 2 is present in amounts up to about 1%.
Claim 5
Dependent Claim
19 words
A composite powder according to claim 2, in which the CaO is present in amounts up to about 2%.
Claim 6
Dependent Claim
92 words
A complexed chromic oxide composite powder consisting essentially of, by weight, about 42% to 46% Cr 2 O 3 , about 7 to 10% MgO, about 8 to 10% Fe 2 O 3 , about 4 to 7% TiO 2 and about 28% to 32% Al 2 O 3 , and SiO 2 in amounts up to about 5%, said powder including a glassy phase and providing a refractory coating which contains a significant glassy phase and has a Rockwell 15N scale hardness reading in the range of about 84 to 87.
Claim 7
Dependent Claim
92 words
A complexed chromic oxide composite powder consisting essentially of, by weight, about 42% to 46% Cr 2 O 3 , about 7 to 10% MgO, about 8 to 10% Fe 2 O 3 , about 4 to 7% TiO 2 and about 28% to 32% Al 2 O 3 , and SiO 2 in amounts up to about 5%, said powder including a glassy phase and providing a refractory coating which contains a significant glassy phase and has a Rockwell 15N scale hardness reading in the range of about 84 to 87.
Claim 8
Dependent Claim
25 words
A composite powder according to claim 5 which contains, in addition, at least one material selected from the group consisting of ZrO 2 and CaO.
Claim 9
Dependent Claim
22 words
A composite powder according to claim 5, in which the ZrO 2 and CaO are present in amounts up to about 0.5%.
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) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |