Patent · US Active

Process for preparing nano-or microparticles comprising a carrier-polymer and one or more biologically active ingredients

US11819576B2 · kind B2 · utility

0Cited by

4References

17Claims

0Family size

Assignee

Evonik Operations GmbH · DE

Inventors

Michael Damm · Rödermark, DE
Andrea Engel · Birmingham, US
Melanie Liefke · Ober-Ramstadt, DE

Key dates

Filing date	Oct 29, 2020
Grant date	Nov 21, 2023
Priority date	—
Expiry date	Oct 29, 2040

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K31/635
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A process can be used for preparing nano- or microparticles containing a carrier-polymer and a biologically active ingredient. The process is a solvent emulsion process involving an organic phase (OP) and an aqueous phase (AP) to form an emulsion. In the case of an oil-in-water emulsion (O/W), the organic phase (OP) contains the biologically active ingredient dissolved or dispersed therein. Alternatively, in the case of a water-in-oil emulsion (W1/O), the aqueous phase (AP) contains the biologically active ingredient dissolved or dispersed therein. The organic phase (OP) is saturated with the salt-containing aqueous phase (AP) and vice versa.

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