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:
Nov. 10, 1998
Filed:
Jan. 22, 1997
Applicant:
Inventors:
I-Fan Wang, San Diego, CA (US);
Jerome F Ditter, Santa Ana, CA (US);
Robert Zepf, Solana Beach, CA (US);
Assignee:
USF Filtration and Separations Group Inc., Timonium, MD (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; B01D / ;
U.S. Cl.
CPC ...
4283105 ; 210490 ; 21050023 ; 21050027 ; 264 41 ; 264216 ; 427244 ; 427245 ; 4283155 ; 4283157 ;
Abstract
The present invention relates to the field synthetic polymeric membrane materials formed from casting polyvinylidene difluoride (PVDF) polymer solutions and/or dispersions. Membranes formed in accordance with the present invention are all highly porous. Both internally isotropic membranes and highly asymmetric PVDF membranes are disclosed. The membranes of the invention are useful in a variety of microfiltration and ultrathin applications.