US3867157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and compositions for porcelain enameling
Assignee: SCM Corp
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Filing: 1972-04-17
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Granted: 1975-02-18
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Expires: 1992-04-17
Abstract
Abstract Disclosed are methods and compositions for stabilizing titaniaopacified porcelain enameling frits against the yellow ''''color shift'''' upon firing, by applying to the frit particles prior to firing a titanium compound which when heated to a temperature lower than fusion temperature of the frit particles will form a hydrous titania layer in the amount sufficient for enhancing the formation of the anatase polymorph of titania in the resulting porcelain enameling coating.
Inventors
- 👤 Jr John E Peeling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:31
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/02; C03C8/08; C03C8/10; C03C8/12; C03C8/14; C03C8/20; C03C2205/00; C03C2205/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
70 words
A PORCELAIN ENAMELING COMPOSITION COMPRISING COATED CERAMIC FRIT PARTICLES WHICH CONTAIN AT LEAST ABOUT 10 WEIGHT PERCENT CRYSTALLIZABLE TIO2 AND WHICH HAVE A SURFACE LAYER CONTAINING PER 100 WEIGHT PARTS OF SAID FRIT PARTICLES AN AMOUNT EQUIVALENT TO AT LEAST ABOUT 0...1 WEIGHT PARTS OF HYDROUS TITANIA OF A TITANIUM COMPOUND WHICH WILL FORM HYDROUS TITANIA WHEN HEATED TO A TEMPERATURE LOWER THAN THE FUSION TEMPERATURE OF SAID FRIT PARTICLES.
Claim 2
Dependent Claim
70 words
A PORCELAIN ENAMELING COMPOSITION COMPRISING COATED CERAMIC FRIT PARTICLES WHICH CONTAIN AT LEAST ABOUT 10 WEIGHT PERCENT CRYSTALLIZABLE TIO2 AND WHICH HAVE A SURFACE LAYER CONTAINING PER 100 WEIGHT PARTS OF SAID FRIT PARTICLES AN AMOUNT EQUIVALENT TO AT LEAST ABOUT 0...1 WEIGHT PARTS OF HYDROUS TITANIA OF A TITANIUM COMPOUND WHICH WILL FORM HYDROUS TITANIA WHEN HEATED TO A TEMPERATURE LOWER THAN THE FUSION TEMPERATURE OF SAID FRIT PARTICLES.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein said surface layer contains an ester of titanic acid or the ammonium salt of such ester.
Claim 4
Dependent Claim
103 words
The composition of claim 2 wherein said ester is selected from the group consisting of esters represented by the formula TI(OR)n(OH)4 n where 2 < or = n < or = 4 and where R stands for a. an alkyl radical having from 1 to 8 carbon atoms; or b. an aliphatic acyl radical having from 1 to 18 carbon atoms; or c. an aliphatic radical having an amino nitrogen or a carbonyl oxygen or a carboxyl oxygen or an alcohol oxygen in either a Beta or gamma position relative to the atom which is the normal bonding site of said aliphatic radical.
Claim 5
Dependent Claim
22 words
The composition of claim 2 wherein said ester is selected from the group consisting of titanium lactate, titanium citrate, and titanium tartrate.
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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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |