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Patent US3956558A successfully refreshed from Google Patents.
US3956558A
Expired / Lapsed
US
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Ceramic decalcomania and method
Assignee: Commercial Decal Inc
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Filing: 1975-01-24
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Granted: 1976-05-11
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Expires: 1995-01-24
Abstract
Abstract An overglaze decalcomania is provided which includes a prefused low melting point glass flux or frit as a protective layer and is substantially resistant to both acid and alkali attack, to mechanical abrasion, and inhibits release of lead, cadmium and other toxic substances normally found in decalcomanias. The frit is comprised of increments of lead oxide, silicon dioxide, cadmium oxide and tin oxide, and optionally titanium dioxide. It can include substituents of conventional frits as well. There is also provided a method for preparing such an overglaze decalcomania.
Inventors
- 👤 Louis A. Blanco
- 👤 William F. Wenning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:06
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3417; B; B44; B44C; B44C1/00; B44C1/16; B44C1/165; B44C1/175; B44C1/1756; C03C4/00; C03C8/00; C03C8/02; C03C8/10; C03C8/12; C03C2217/00; C03C2217/40; C03C2217/43; C03C2217/44; C03C2217/45; C03C2217/452; C03C2217/46; C03C2217/48; C03C2217/485; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24876; Y10T428/24893; Y10T428/24901; Y10T428/24909
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
146 words
An overglaze decalcomania comprising a backing sheet, a design layer disposed on the backing sheet and a protective layer of low melting point tin oxide-containing glass comprising from about 10 to about 50% by weight lead oxide, from about 15 to about 65% by weight silicon dioxide, from about 1 to about 10% by weight cadmium oxide, from about 1 to about 15% by weight tin oxide, and from about 0.5 to about 10% by weight titanium dioxide, so that after the decalcomania is applied to a vitreous surface and the assemblage fired, the protective layer of low melting point glass fuses and tightly binds the design layer to the vitreous surface, forms a protective coating on the vitreous surface which is resistant to acid attack and inhibits lead and/or cadmium release from the design layer and does not mask the color of the design layer.
Claim 2
Dependent Claim
146 words
An overglaze decalcomania comprising a backing sheet, a design layer disposed on the backing sheet and a protective layer of low melting point tin oxide-containing glass comprising from about 10 to about 50% by weight lead oxide, from about 15 to about 65% by weight silicon dioxide, from about 1 to about 10% by weight cadmium oxide, from about 1 to about 15% by weight tin oxide, and from about 0.5 to about 10% by weight titanium dioxide, so that after the decalcomania is applied to a vitreous surface and the assemblage fired, the protective layer of low melting point glass fuses and tightly binds the design layer to the vitreous surface, forms a protective coating on the vitreous surface which is resistant to acid attack and inhibits lead and/or cadmium release from the design layer and does not mask the color of the design layer.
Claim 3
Dependent Claim
19 words
An overglaze decalcomania in accordance with claim 1 comprising from about 1 to about 8% by weight titanium dioxide.
Claim 4
Dependent Claim
19 words
An overglaze decalcomania in accordance with claim 1 comprising from about 1 to about 6% by weight titanium dioxide.
Claim 5
Dependent Claim
25 words
An overglaze decalcomania in accordance with claim 1 wherein the protective layer comprises, in addition, from about 1 to about 4% by weight zirconium dioxide.
Claim 6
Dependent Claim
23 words
An overglaze decalcomania in accordance with claim 1 wherein the protective layer includes, in addition, up to about 20% by weight boric oxide.
Claim 7
Dependent Claim
22 words
An overglaze decalcomania in accordance with claim 1 wherein the design layer is formed from mixtures of frit particles and pigment particles.
Claim 8
Dependent Claim
18 words
An overglaze decalcomania in accordance with claim 1 comprising from about 6 to 15% by weight tin oxide.
Claim 9
Independent Claim
106 words
A method for preparing an overglaze decalcomania which comprises applying a design layer to a backing sheet, and applying a protective coating of low melting glass over the design layer, said glass comprising from about 10 to about 50% by weight lead oxide, from about 15 to about 65% by weight silicon dioxide, from about 1 to about 10% by weight cadmium oxide, from about 1 to about 15% by weight tin oxide and from about 0.5 to about 10% by weight titanium dioxide firing the assemblage to fuse the protective coating and form a layer which does not mask the color of the design layer.
Claim 10
Independent Claim
106 words
A method for preparing an overglaze decalcomania which comprises applying a design layer to a backing sheet, and applying a protective coating of low melting glass over the design layer, said glass comprising from about 10 to about 50% by weight lead oxide, from about 15 to about 65% by weight silicon dioxide, from about 1 to about 10% by weight cadmium oxide, from about 1 to about 15% by weight tin oxide and from about 0.5 to about 10% by weight titanium dioxide firing the assemblage to fuse the protective coating and form a layer which does not mask the color of the design layer.
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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |