US4172733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitreous enamel compositions
Assignee: Okuno Chemical Industries Co Ltd
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Filing: 1977-11-15
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Granted: 1979-10-30
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Expires: 1997-11-15
Abstract
Abstract A vitreous enamel composition comprising 1 part by weight of a vitreous enamel solid component composed of (1) 90-99.9 wt. % of glass powder consisting predominantly of 40 to 80 wt. % of SiO 2 , 1-25 wt. % of at least one of B 2 O 3 and CaO, and 1-20 wt. % of R 2 O in which R is K, Na or Li, and (2) 0.1-10 wt. % of palladium powder, and 1-20 parts by weight of an organic vehicle.
Inventors
- 👤 Yukikazu Moritsu
- 👤 Kooji Yamada
- 👤 Masatoshi Wada
- 👤 Eiji Munemoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:04
CPC Classifications
C; C03; C03C; C03C12/00; C03C17/00; C03C17/02; C09; C09D; C09D5/00; C09D5/38; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/1851; C23C18/1862; C23C18/1865; C23C18/1872; C23C18/1875; C23C18/1882; C23C18/1886; C23C18/1893
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
A vitreous enamel composition for undercoating glass and ceramic articles to be electrolessly plated comprising 1 part by weight of a vitreous enamel solid component composed of (1) 90-99.9 wt. % of glass powder consisting of 40 to 80 wt. % of SiO 2 , 1-25 wt. % of at least one of B 2 O 3 and CaO, 1-20 wt. % of R 2 O in which R is K, Na, or Li and up to 20 wt. % of at least one of BaO, MgO, NaF, ZnO, TiO 2 , ZrO 2 , SnO 2 , Al 2 O 3 , Bi 2 O 3 and Fe 2 O 3 , and (2) 0.1-10 wt. % of palladium powder, and 1-20 parts by weight of an organic vehicle.
Claim 2
Dependent Claim
130 words
A vitreous enamel composition for undercoating glass and ceramic articles to be electrolessly plated comprising 1 part by weight of a vitreous enamel solid component composed of (1) 90-99.9 wt. % of glass powder consisting of 40 to 80 wt. % of SiO 2 , 1-25 wt. % of at least one of B 2 O 3 and CaO, 1-20 wt. % of R 2 O in which R is K, Na, or Li and up to 20 wt. % of at least one of BaO, MgO, NaF, ZnO, TiO 2 , ZrO 2 , SnO 2 , Al 2 O 3 , Bi 2 O 3 and Fe 2 O 3 , and (2) 0.1-10 wt. % of palladium powder, and 1-20 parts by weight of an organic vehicle.
Claim 3
Dependent Claim
52 words
The vitreous enamel composition according to claim 1, in which said glass powder consists of 45-75 wt. % of SiO 2 , 3-15 wt. % of at least one of B 2 O 3 and CaO, and 5-15 wt. % of R 2 O in which R is K, Na or Li.
Claim 4
Dependent Claim
76 words
The vitreous enamel composition according to claim 1, in which said vitreous enamel solid component is composed of (1) 92-99 wt. % of glass powder consisting of 40 to 80 wt. % of SiO 2 , 1-25 wt. % of at least one of B 2 O 3 and CaO, and 1-20 wt. % of R 2 O in which R is K, Na or Li, and (2) 1 to 8 wt. % of palladium powder.
Claim 5
Dependent Claim
35 words
The vitreous enamel composition according to claim 1, in which said organic vehicle is contained in an amount of 1-10 parts by weight based on 1 part by weight of the vitreous enamel solid component.
Claim 6
Dependent Claim
23 words
The vitreous enamel composition according to claim 1 which further contains at least one of substances not melting during firing of the composition.
Claim 7
Dependent Claim
27 words
The vitreous enamel composition according to claim 5, in which said substance is at least one of barium sulfate, calcium sulfate, kaolin, feldspar, siliceous sand and alumina.
References Cited (Backward Citations)
US3479216A
Cited
US4029605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |