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(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) Application No.: 00927/KOLNP/2005 A
(22) Date of filing of Application: 18/05/2005 (43) Publication Date: 09/06/2006
(54) Title of the invention: HYDROPHILIC MICROPOROUS MEMBRANE
(51) International classification : B01D 61/04, 69/12,
71/34, 71/78, C08J
9/36
(31) Priority Document No : 2002-304766
2002-376767
2003-023709
(32) Priority Date : 18/10/2002
26/12/2002
31/01/2003
(33) Name of priority country : JAPAN
(86) International Application No and : PCT/JP03/13329 &
Filing Date
: 17/10/2003
(87) International Publication No : WO 04/035180
(61) Patent of addition to Application No : NA
Filed on : NA
(62) Divisional to Application No : NA
Filed on : NA
(71) Name of Applicant:
ASAHI KASEI PHARMA CORPORATION.,
Address of the Applicant:
9-1, KANDA MITOSHIRO-CHO, CHIYODA-KU,
TOKYO 101-8418, JAPAN.
(72) Name of the Inventor:
ICHIRO KOGUMA
FUJIHARU NAGOYA
Filed U/S 5(2) before The Patents (Amendment)
Act, 2005: NO
(57) Abstract:
A hydrophilic microporous membrane comprising a thermoplastic resin, having been subjected to hydrophilizing treatment and having a
maximum pore size of 10 to 100nm, wherein when 3 wt% bovine immunoglobulin having a monomer ratio of 80 wt% or more is filtered
at a constant pressure of 0.3 MPa, an average permeation rate (liter/m 2 /h) for 5 minutes from the start of filtration (briefly referred to as
globulin permeation rate A) satisfies the following formula (1) and an average permeation rate (liter/m 2 /h) for 5 minutes from the time
point of 55 minutes after the start of filtration (briefly referred to as globulin permeation rate B) satisfies the following formula (2):
Globulin permeation rage A> 0.0015 x maximum pore size (nm) 2.75 (1) Globulin permeation rate B/globulin permeation rate A > 0.2 (2).
(FIG). nil
The Patent Office Journal 09/06/2006 11051