Patent · US Expired

Oil-in-water emulsion formulation containing free and entrapped hydroquinone and retinol

US6896890B2 · kind B2 · utility

13Cited by

2References

21Claims

0Family size

Assignee

R.P. Scherer Technologies, LLC · US

Inventors

B. Sandhya Singh · San Jose, US
Subhash J. Saxena · Ringoes, US
Marie-Helen Beausoleil · Weiden in der Oberpfalz, DE

Key dates

Filing date	May 16, 2002
Grant date	May 24, 2005
Priority date	—
Expiry date	Mar 29, 2023

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K2800/56
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

An oil-in-water emulsion formulation containing hydroquinone and retinol, which comprises an oil-in-water emulsion containing free hydroquinone, hydroquinone entrapped in absorbent micro-agglomerates and/or impregnated in porous microparticles; and retinol-impregnated microparticles.

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