Patent · US Expired

.alpha.-hydroxyketoalkyl derivatives as light protection filters

US5968482A · kind A · utility

0Cited by

3References

5Claims

0Family size

Assignee

Merck Patent GmbH · DE

Inventors

Roland Martin · Hamburg, DE
Ingeborg Stein · Langen (Hessen), DE
Ulrich Heywang · Darmstadt, DE
Michael Schwarz · Pocking, DE
Thekla Kurz · Darmstadt, DE

Key dates

Filing date	Sep 20, 1996
Grant date	Oct 19, 1999
Priority date	—
Expiry date	Sep 20, 2016

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K2800/57
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention relates to the use of .alpha.-hydroxyketoalkyl derivatives as light protection filters for cosmetic or pharmaceutical products, the .alpha.-hydroxyketoalkyl group being linked, if appropriate via a spacer, to a chromophoric group which has an absorption maximum in a wavelength range of between 280 and 400 nm and has a conjugated .pi.-electron system of at least 8 .pi.-electrons, and to new .alpha.-hydroxyalkyl derivatives, processes for their preparation and pharmaceutical and cosmetic formulations comprising these derivatives as light protection substances.

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