Patent · US Expired

Optical brighteners

US3962219A · kind A · utility

0Cited by

3References

5Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Alfons Dorlars · Leverkusen, DE
Otto Neuner
Hans Theidel

Key dates

Filing date	Sep 27, 1974
Grant date	Jun 8, 1976
Priority date	—
Expiry date	Sep 27, 1994

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D498/04
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Compounds of the formula ##SPC1## Wherein R.sub.1 and R.sub.2 denote hydrogen, halogen, nitrile, alkoxy, alkyl, aryl, cycloalkyl, aralkyl, carboxyl or carboxylic acid ester groups are suitable for the optical brightening of synthetic organic high molecular materials.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.