The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 1989
Filed:
Jun. 29, 1987
Applicant:
Inventor:
Albert Fabre, Venissieux, FR;
Assignee:
Rhone-Poulenc Recherches, Courbevoie Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; B01D / ;
U.S. Cl.
CPC ...
21050023 ; 2105003 ; 21050031 ; 21050041 ; 21050042 ; 521 62 ;
Abstract
Hydrophilic semipermeable membranes which retain their capacity for filtration, even after drying, and which are well adapted for either ultrafiltration or microfiltration, are comprised of at least 70% by weight of polyvinylidene fluoride (PVFD) and up to 30% by weight of a hydrophilic polymer compatible therewith, e.g., a cellulose acetate or sulfonated polysulfone.