US4959090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass enamel coating compositions
Assignee: BASF Corp
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Filing: 1989-07-25
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Granted: 1990-09-25
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Expires: 2009-07-25
Abstract
Abstract In glass enamel coating compositions containing a glass frit system, optionally a metal oxide pigment and a vehicle therefor, the improvement comprising the presence therein of a series of metal powders to provide anti-stick, color maintenance and adhesion properties; the resulting coatings being particularly effective for application to glass sheets which are subsequently subjected to high temperature forming procedures.
Inventors
- 👤 Barry P. Reinherz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:44
CPC Classifications
C; C03; C03B; C03B40/00; C03B40/005; C03B23/00; C03B23/02; C03B23/023; C03C; C03C17/00; C03C17/02; C03C17/04; C03C8/00; C03C8/14; C03C8/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
130 words
In the method for forming a glass enamel coated glass sheet, the glass enamel composition comprising a glass frit system and a vehicle therefor, wherein the glass enamel composition is coated onto the glass sheet, the coated glass sheet is heated to soften the sheet, to remove the volatiles in said enamel and to bond the remainder of the enamel to the sheet, the softened glass sheet is contacted with a fibrous material covered forming die, the forming die is removed and the glass sheet is cooled; the improvement comprising incorporating into the enamel composition from about 2-75%, by weight, of a finely divided metal powder selected from the group consisting of chromium, chromium carbide, cobalt, copper, stainless steel, nickel, silicon, titanium, tungsten and tellurium metal powders and mixtures thereof.
Claim 2
Dependent Claim
130 words
In the method for forming a glass enamel coated glass sheet, the glass enamel composition comprising a glass frit system and a vehicle therefor, wherein the glass enamel composition is coated onto the glass sheet, the coated glass sheet is heated to soften the sheet, to remove the volatiles in said enamel and to bond the remainder of the enamel to the sheet, the softened glass sheet is contacted with a fibrous material covered forming die, the forming die is removed and the glass sheet is cooled; the improvement comprising incorporating into the enamel composition from about 2-75%, by weight, of a finely divided metal powder selected from the group consisting of chromium, chromium carbide, cobalt, copper, stainless steel, nickel, silicon, titanium, tungsten and tellurium metal powders and mixtures thereof.
Claim 3
Dependent Claim
17 words
The method of claim 1, wherein said glass enamel coating composition also contains a metal oxide pigment.
Claim 4
Dependent Claim
24 words
The method of claim 1, wherein said metal powder is selected from the group consisting of nickel, tungsten, tellurium, silicon, chrome, and stainless steel.
Claim 5
Dependent Claim
19 words
The method of claim 1, wherein the average particle size of the powder is less than about 0.03 mm.
Claim 6
Dependent Claim
15 words
The method of claim 1, wherein said glass frit comprises a combination of metal oxides.
Claim 7
Dependent Claim
31 words
The method of claim 5, wherein said oxides are selected from the group consisting of zinc, lead, bismuth, silicon, titanium, zirconium, sodium, boron, lithium, potassium, calcium, aluminum, tin and magnesium oxides.
Claim 8
Dependent Claim
14 words
The method of claim 6, wherein said frit is a lead borosilicate glass frit.
Claim 9
Dependent Claim
11 words
The method of claim 1, wherein an organic vehicle is present.
Claim 10
Dependent Claim
25 words
The method of claim 8, wherein said vehicle is based on pine oil, vegetable oils, mineral oils, low molecular weight petroleum fractions or tridecyl alcohol.
Claim 11
Dependent Claim
13 words
The method of claim 9, wherein said vehicle is based on pine oil.
Claim 12
Dependent Claim
13 words
The method of claim 2, wherein said pigment is a black spinel pigment.
Claim 13
Dependent Claim
27 words
The method of claim 2, wherein said composition comprises a lead-borosilicate frit, a black spinel pigment, a finely divided metal powder and a pine oil-based vehicle therefor.
Claim 14
Dependent Claim
10 words
The method of claim 1, wherein said vehicle is UV-curable.
References Cited (Backward Citations)
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US4555415A
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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) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |