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:
Dec. 09, 1980
Filed:
Jun. 22, 1978
Applicant:
Inventors:
Hiroshi Mano, Osaka, JP;
Koichi Okita, Osaka, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
521 62 ; 521 63 ; 521 64 ;
Abstract
A process for preparing a porous material having a fine pore size which comprises preparing a solution comprising resin comprising a vinylidene fluoride/tetrafluoroethylene copolymer, a vinylidene fluoride polymer or a mixture thereof and at least a solvent for the resin and a non-solvent for the resin, and removing the solvent and the non-solvent from the solution, wherein a part of the resin is dissolved or swollen during the removal of the solvent and non-solvent.