High strength capsules, process of preparing and using the same

US6165503A · kind A · utility

Assignee

• FMC Biopolymer AS · NO

Inventors

• Olav Gåser.o slashed.d · Trondheim, NO
• .O slashed.ivind Skaugrud · Hokksund, NO
• Peter William Dettmar · Patrington, GB
• Gudmund Sjåk-Braek · Trondheim, NO
• Ian Gordon Jolliffe · Corby, GB

Key dates

• Filing date: Jul 1, 1998
• Grant date: Dec 26, 2000
• Expiry date: Jul 1, 2018

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61P31/04
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

In the formation of capsules having a polyanionic polysaccharide core and a polycationic polysaccharide membrane layer, improved binding of the polycationic polysaccharide is achieved by including polyvalent ions, especially calcium ions, at the membrane forming step.