Dialkylsulfonamide dyes
US3962245A · kind A · utility
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Key dates
| Filing date | Jan 16, 1975 |
| Grant date | Jun 8, 1976 |
| Priority date | — |
| Expiry date | Jan 16, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B57/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel dyes for plastic substrates which act as filters in such substrates for argon and double-frequency neodymium laser beams are sulfonamide derivatives of 12-H-naphthoperinone. These dyes are soluble in and compatible with the plastic substrate and provide stability to ultraviolet light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.