Patent · US Expired

Spherical microparticles containing linear polysaccharides

US6703048B1 · kind B1 · utility

4Cited by

5References

6Claims

0Family size

Assignee

Celanese Ventures GmbH · DE

Inventors

Holger Bengs · Frankfurt, DE
Jürgen Grande · Bad Soden, DE
Arnold Schneller · Mainz, DE
Gitte Böhm · Frankfurt, DE

Key dates

Filing date	Apr 14, 2000
Grant date	Mar 9, 2004
Priority date	—
Expiry date	Apr 14, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2305/00
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Microparticles with a uniform spherical shape and a very narrow size distribution are described. They consist wholly or partly of a linear water-insoluble polysaccharide, preferably of 1,4-&agr;-D-polyglucan, and may contain other, in particular biodegradable, polymers and/or active substances. They are suitable inter alia for the controlled delivery of active substances. They are prepared by dissolving 1,4-&agr;-D-polyglucan or the polysaccharide in a solvent, introducing the solution into a precipitant, cooling the mixture and removing the particles formed.

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