Patent US4481036A successfully refreshed from Google Patents.
US4481036A
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Glaze for use on non-metallic dental copings
Assignee: Dentsply Sirona Inc
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Filing: 1983-03-09
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Granted: 1984-11-06
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Expires: 2003-03-09
Abstract
Abstract A stable glaze for use on ceramic dental copings has the following composition: -Component Proportion, % -SiO2 71-74 -Al2O3 10-12 -K2O 4-5 -Na2O 4-5 -CaO 2-4.5 -B2O3 3.5-5.5
Inventors
- 👤 Carlino Panzera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:13
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/02; A; A61; A61K; A61K6/00; A61K6/15; A61K6/16; A61K6/70; A61K6/78; A61K6/80; A61K6/802
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A translucent dental glaze composition suitable for application to a dental porcelain ceramic substrate, said glaze having a maturing temperature of from about 1700° to about 1900° F., and a coefficient of thermal expansion of from about 4 to about 9×10 -6 in./in./°C., and consisting of, on a weight basis, the following components:Component Proportion, %______________________________________SiO 2 71-74Al 2 O 3 10-12K 2 O 4-5Na 2 O 4-5CaO 2-4.5B 2 O 3 3.5-5.5______________________________________
Claim 2
Dependent Claim
72 words
A translucent dental glaze composition suitable for application to a dental porcelain ceramic substrate, said glaze having a maturing temperature of from about 1700° to about 1900° F., and a coefficient of thermal expansion of from about 4 to about 9×10 -6 in./in./°C., and consisting of, on a weight basis, the following components:Component Proportion, %______________________________________SiO 2 71-74Al 2 O 3 10-12K 2 O 4-5Na 2 O 4-5CaO 2-4.5B 2 O 3 3.5-5.5______________________________________
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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) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |