Précédent
Suivant
Brevet : EP0856352 - MEMBRANE EN POLYSULFONE POUR PURIFIER LE SANG
Titre
MEMBRANE EN POLYSULFONE POUR PURIFIER LE SANG
N° et date de publication de la demande
EP0856352 - 05/08/1998
Type de la demande
A1
N° et date de dépôt
EP96933609.8 - 09/10/1996
N° et date de priorité
JP28633295 - 09/10/1995
Classification CIB
Classification CPC
B01D 69/08 ; B01D 71/68 ; B01D 71/78 ; B01D 71/80 ; B01D2323/12 ; B01D2323/30 ; B01D 71/441 ; B01D 67/00165 ; B01D2325/341 ; B01D 71/281 ; B01D 71/80 ; B01D 71/68 ; B01D 69/08 ; B01D2323/12 ; B01D 71/78 ; B01D2323/30 ; B01D 67/00165 ; B01D 71/281 ; B01D 71/441 ; B01D2325/341
Famille de brevets
WO9713575A1 ; EP0856352A1 ; JP4000196B1 ; ES2197249T3 ; DE69629042T2 ; US6113785A
Abrégé
Résumé dans la langue de publication, traduction non disponible A polysulfone membrane for purifying blood having excellent compatibility with blood and the process producing the membrane are disclosed. The membrane comprises a mixed polymer phase of a graft copolymer and/or block copolymer having a molecular weight of 3 X 10**5 daltons or more and comprising (A) a hydrophilic segment and (B) a hydrophobic segment (exclusive of polysulfone) in a total amount of from 0.5 to 30 parts by weight per 100 parts by weight of polysulfone, with the monomer unit ratio (A/B) between the segments A and B being from 0.5 to 5. The copolymer is preferably a graft copolymer where the hydrophilic segment is a polyvinylpyrrolidone segment and the hydrophobic segment is a polystyrene segment. The membrane can be prepared by applying a wet film formation process to a dope containing an appropriate solvent of the mixed polymer, such as N,N-dimethylacetamide. The membrane for purifying blood reduces cumbersomeness in the washing of the coagulated membrane during the film formation process and allows recovery of the solvent from the coagulating solution at a high recovery rate because the copolymer contained in the structure of the membrane is substantially not eluted into water contacted during the film formation process and the washing step.
INTERVENANTS
Déposant
ASAHI CHEMICAL IND (ASAHI KASEI KABUSHIKI KAISHA) - JP
Titulaire
Asahi Kasei Kabushiki Kaisha
Inventeur
MIURA MORIKAZU (MIURA, MORIKAZU) - JP
NITADORI YOSHIAKI (NITADORI, YOSHIAKI) - JP
KIGUCHI AKIRA (KIGUCHI, AKIRA) - JP
MUKAIYAMA SHIGEMI (MUKAIYAMA, SHIGEMI) - JP
Mandataire
GEVERS & ORES - IMMEUBLE LE PALATIN 2 3 COURS DU TRIANGLE - 92939 PARIS LA DEFENSE CEDEX - FR
STATUT EN FRANCE : Déchu
Délivrance
09/07/2003
Remise de traduction du brevet
14/05/2004 (BOPI 2004-20)
Date de constatation de déchéance
-
30/06/2011 (BOPI 2011-30)
Dernière annuité payée
12/10/2009
Quantième- N° de l'annuité payée
14
Date de paiement de la prochaine annuité
02/11/2010
