Patent · US Expired

Process for the preparation of porous, hydrophilic, highly swellable hydrogels

US5973014A · kind A · utility

71Cited by

6References

15Claims

0Family size

Inventors

Rüdiger Funk · Niedernhausen, DE
Norbert Herfert · Charlotte, US
Ulrich Riegel · Landstuhl, DE

Key dates

Filing date	Mar 27, 1997
Grant date	Oct 26, 1999
Priority date	—
Expiry date	Mar 27, 2017

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2300/00
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The present application relates to a process for the preparation of porous, hydrophilic, highly swellable hydrogels, which comprises freeze-drying hydrophilic, highly swellable hydrogels which have been swollen with water.

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