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:
Jul. 06, 1993
Filed:
Jul. 02, 1991
Applicant:
Inventors:
Assignee:
Chisso Corporation, Ohsaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
D04H / ;
U.S. Cl.
CPC ...
156 732 ; 156167 ; 156173 ; 156184 ; 1562722 ; 264 23 ; 264 25 ; 264115 ; 264121 ; 264125 ; 264171 ; 264173 ; 2642093 ; 264518 ; 264555 ;
Abstract
A precision cartridge filter having an average filter diameter of 10 .mu.m or less is produced by preparing a web composed of conjugate microfine fibers by a conjugate melt-blowing process, wherein the conjugate microfine fibers have a lower melting point component, a higher melting point component, and a melting point difference between the lower melting point component and higher melting point component of 20.degree. C. or more; followed by heating and molding the web at a temperature greater than or equal to the melting point of said lower melting point component, but less than the melting point of said higher melting point component.