Patent · US Active

Polymer shells

US10099192B2 · kind B2 · utility

4Cited by

14References

11Claims

0Family size

Assignee

Cellutech AB · SE

Inventors

Christopher Carrick · Danderyd, SE
Bert Pettersson · Stockholm, SE
Lars Wagberg · Kungsängen, SE
Marcus Ruda · Rimbo, SE

Key dates

Filing date	Feb 9, 2010
Grant date	Oct 16, 2018
Priority date	—
Expiry date	Mar 13, 2031

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J20/3293
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The present invention relates to a method for the preparation of polymer shells, preferably composed of cellulose or hemicellulose, comprising the steps of dissolving the polymer component in a first solvent, preferably an organic solvent and precipitating the polymer component by contacting the first solution with a second solvent, which second solvent has a polar character, and in which second solvent the polymer component is essentially insoluble, thereby obtaining polymer shells. Moreover, the invention refers to the polymer shells as such, having permeable and responsive properties, as well as various applications comprising such polymer shells within the fields of drug delivery, separation techniques, and inter alia filling material.

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