Global Patent Index - EP 1094792 A1

EP 1094792 A1 2001-05-02 - MATERIALS AND METHODS RELATING TO ENCAPSULATION

Title (en)

MATERIALS AND METHODS RELATING TO ENCAPSULATION

Title (de)

EINKAPSELUNGSMATERIALIEN UND -VERFAHREN

Title (fr)

MATERIAUX ET PROCEDES D'ENCAPSULATION

Publication

EP 1094792 A1 (EN)

Application

EP 99929581 A

Priority

  • GB 9902159 W
  • GB 9814619 A

Abstract (en)

[origin: WO0001373A1] A method for encapsulating a core material within a capsule having a permeable or semipermeable membrane is disclosed using a complex formation reaction between oppositely charged polymers, wherein one of the polymers is an oligosaccharide such as chitosan and the reaction is carried out at a pH between about 6.6. and 7.5. The method overcomes the poor solubility of such high molecular weight polysaccharides at neutral and alkaline pH, providing capsules having useful strength and permeability.

IPC 1-7 (main, further and additional classification)

A61K 9/50; C12N 11/00

IPC 8 full level (invention and additional information)

A61K 9/50 (2006.01); A61K 35/12 (2006.01)

CPC (invention and additional information)

A61K 9/5036 (2013.01); A61K 9/5089 (2013.01); A61K 2035/128 (2013.01)

Citation (search report)

See references of WO 0001373A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0001373 A1 20000113; AU 4636699 A 20000124; EP 1094792 A1 20010502; GB 9814619 D0 19980902

INPADOC legal status


2004-04-28 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20031017

2001-05-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010118

2001-05-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-05-02 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI