Dental porcelain compositions
US6206958A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1999 |
| Grant date | Mar 27, 2001 |
| Priority date | — |
| Expiry date | Jul 15, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C8/20
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Porcelain compositions of the present invention comprises particulate of one or more glass or glass-ceramic powder components. Additionally, one or more opacifing agents, pigments, fluorescing agents and the like may be included in the composition. Based on volume percent, the particulate has a d.sub.10 of from about 1.1 and about 1.8 microns; a d.sub.50 of from about 3 to about 6 microns; a d.sub.90 of from about 8 to about 16 microns; and about 1.0 to about 4.0% by volume of the particulate has a particle size greater than or equal to about 20 microns. The mean particle size is preferably in the range of about 3.0 microns to about 7.5 microns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.