US4492766A
Expired / Lapsed
US
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Spray-coating material
Assignee: Czech Academy of Sciences
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Filing: 1983-06-03
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Granted: 1985-01-08
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Expires: 2003-06-03
Abstract
Abstract Spray-coating materials having a high heat-resistance and thermal conductivity for the surface protection of materials. The spray-coating material consists of 8-35 wt. % magnesium oxide MgO or calcium oxide CaO, 2-10 wt. % of beryllium oxide BeO and 55-90 wt. % of aluminum oxide Al 2 O 3 , zirconium dioxide ZrO 2 , silicon dioxide SiO 2 , chromic oxide Cr 2 O 3 and titanium dioxide TiO 2 . The spray-coating material of the invention can be employed to advantage, for example, in the chemical industry and in metallurgy.
Inventors
- 👤 Karel Zverina
- 👤 Petr Kroupa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:46
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; C23C4/10; C23C4/11
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
Spray-coating material consisting essentially of an admixture of the following metal oxides which admixture consists of 8-35 wt. % of a metal oxide selected from the group consisting of magnesium oxide MgO and calcium oxide CaO, 2-10 wt. % of beryllium oxide BeO, and 55-90 wt. % of a metal oxide selected from the group consisting of aluminum oxide Al 2 O 3 , zirconium dioxide ZrO 2 , silicon dioxide SiO 2 , chromic oxide Cr 2 O 3 , and titanium dioxide TiO 2 alone or in admixture.
Claim 2
Dependent Claim
90 words
Spray-coating material consisting essentially of an admixture of the following metal oxides which admixture consists of 8-35 wt. % of a metal oxide selected from the group consisting of magnesium oxide MgO and calcium oxide CaO, 2-10 wt. % of beryllium oxide BeO, and 55-90 wt. % of a metal oxide selected from the group consisting of aluminum oxide Al 2 O 3 , zirconium dioxide ZrO 2 , silicon dioxide SiO 2 , chromic oxide Cr 2 O 3 , and titanium dioxide TiO 2 alone or in admixture.
Claim 3
Dependent Claim
66 words
Spray-coating material as claimed in claim 1, wherein said metal oxide admixture consists of 10-20 wt. % of magnesium oxide MgO, 3-7 wt. % beryllium oxide BeO, 30-35 wt. % of aluminum oxide Al 2 O 3 , 15-25 wt. % chromic oxide Cr 2 O 3 , 8-12 wt. % of silicon dioxide SiO 2 and 15-23 wt. % of zirconium dioxide ZrO 2 .
Claim 4
Dependent Claim
47 words
Spray-coating material as claimed in claim 1, wherein said metal oxide admixture consists of 25-32 wt. % of magnesium oxide MgO, 4-8 wt. % of beryllium oxide BeO, 32-40 wt. % of silicon dioxide SiO 2 , and 26-34 wt. % of zirconium dioxide ZrO 2 .
Claim 5
Dependent Claim
49 words
Spray coating material as claimed in claim 1, wherein said metal oxide admixture consists of 15-20 wt. % of magnesium oxide MgO, 3-8 wt. % of beryllium oxide BeO, 62-80 wt. % of aluminum oxide Al 2 O 3 and 4-6 wt. % of titanium dioxide TiO 2 .
Claim 6
Dependent Claim
32 words
Spray-coating material as claimed in claim 1, which further contains, based on the whole weight of the ceramic oxides, 10-50 wt. % of nickel, aluminum, chromium, copper, titanium, iron, or their mixture.
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) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |