Substituted xanthene compounds
US5149830A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1990 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Feb 23, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Substituted xanthene compounds are described which are capable of functioning as absorbers in high intensity light protective compositions and in materials used to prevent the transmission of high intensity light at selected wavelengths. Also described are high intensity light protective compositions containing an effective amount of a substituted xanthene compound and a polymeric compound and a material which prevents transmission of high intensity light at wavelengths between about 482 to about 556 nanometers. The material of this invention can be used to make protective eyewear, optical filters, shields for protecting a persons body from high intensity light, or shields for protecting components of an optical instrument from high intensity light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.