Global patent index - EP 1032699 A1

EP 1032699 A1 2000-09-06 - HIGH MOLECULAR WEIGHT GAMMA-POLY(GLUTAMIC ACID)

Title (en)

HIGH MOLECULAR WEIGHT GAMMA-POLY(GLUTAMIC ACID)

Title (de)

GAMMA-POLY(GLUTAMINSÄURE) MIT HOHEM MOLEKULARGEWICHT

Title (fr)

ACIDE GAMMA-POLYGLUTAMIQUE (GAMMA-PGA) A MASSE MOLECULAIRE ELEVEE

Publication

EP 1032699 A1 (EN)

Application

EP 98960252 A

Priority

  • US 9824580 W
  • US 6694297 P

Abstract (en)

[origin: WO9925864A2] High molecular weight gamma -PGA is provided. The gamma -PGA is separated from cells of the gamma -PGA producing cell culture after first adjusting the pH of the cell-culture to a pH of less than about 3. Also, the viscosity of a gamma -PGA solution is increased by removing metal ions with a chelator. In addition, gamma -PGA is fractionated directly from a cell culture, such that the fractionated gamma -PGA has low polydispersity. Purified gamma -PGA is produced having a molecular weight of at least 2.5 x 10<6>.

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

C12P 21/02; C12N 1/04; C12N 1/20

IPC 8 full level (invention and additional information)

C12P 21/02 (2006.01)

CPC (invention and additional information)

C12P 21/02 (2013.01)

Citation (search report)

See references of WO 9925864A3

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 9925864 A2 19990527; WO 9925864 A3 19991223; CA 2310631 A1 19990527; EP 1032699 A1 20000906

INPADOC legal status

2003-12-10 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030531

2000-09-13 [D17D] SEARCH REPORT (DELETED)

- Ref Legal Event Code: D17D

2000-09-13 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- Free Format Text: 7C 12P 21/02 A, 7C 12N 1/20 B, 7C 12N 1/04 B, 7C 12N 1/20 J, 7C 12R 1:10 J, 7C 12P 21/02 K, 7C 12R 1:10 K

2000-09-06 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000619

2000-09-06 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

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