Dental bleaching system and method
US6036493A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1998 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Jul 23, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/88
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A dental bleaching system and method having two separated components adapted to be dispensed from a single dispenser as a mixed viscous dental bleach composition. The first component comprises aqueous hydrogen peroxide and the second component includes a gelling agent, catalyst, a pH alkaline buffer, a redox color indicator adapted to oxidize in the presence of a peroxide from a visible color into a neutralized color and a second dye stable in the presence of a peroxide with the concentration of the redox color indicator selected relative to the second dye such that the redox color will be predominant during the bleaching operation and the second dye will be predominant at the end of a controlled time period corresponding to when the bleaching treatment may be discontinued.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.