Patent · US Expired

Benzylidene-.gamma.-butyrolactones, process for their preparation and their use as UV absorber

US6258963A · kind A · utility

1Cited by

3References

21Claims

0Family size

Assignee

Haarmann & Reimer Corporation · DE

Inventors

Oskar Koch · Oebisfelde, DE
William Johncock · Reinbek, DE
Roland Langner · Holzminden, DE

Key dates

Filing date	Dec 9, 1999
Grant date	Jul 10, 2001
Priority date	—
Expiry date	Dec 9, 2019

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61Q17/04
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention relates to modified benzylidene-.gamma.-butyrolactones, to a process for their preparation and to the use as UV absorber, for example in pharmaceutical and cosmetic compositions, sunscreens, daycare and haircare products, for improving industrial products, such as paints, surface coatings, plastics, textiles, packaging materials and rubbers.

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