Optical brightening agents
US5873913A · kind A · utility
15Cited by
19References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1997 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | May 7, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2582
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Optical brightening agents for use in textiles, paper, detergents correspond to the formula ##STR1## where R, R.sub.1 are preferably derived from amino-acids, particularly glutamic and iminodiacetic acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.