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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.:

US 4699733 B1

PDFFull Text
Date of Patent:
Oct. 13, 1987

Filed:

Dec. 11, 1986

Resin compostion for porous film and film prepared therefrom

Applicant:
Inventors:

Shuji Matsumura, Aichi, JP;

Michiyasu Ito, Mie, JP;

Syoichi Tsuji, Aichi, JP;

Hisatosi Suzuki, Aichi, JP;

Syoichi Ito, Aichi, JP;

Assignee:

Mitsui Toatsu Chemicals, Inc., Tokyo, JP;

Attorney:

Sughrue, Mion, Zinn, Macpeak & Seas

Primary Examiner:

Morton Foelak

Int. Cl.
CPC ...
H01B / ;
U.S. Cl.
CPC ...
282521 ; 252518 ; 264 41 ; 264156 ; 2642888 ; 264D / ; 521 92 ; 521143 ;
Abstract

A porous film having a good water vapor permeability is obtained with a high productivity by melting a resin composition comprising 100 parts by weight of a polyolefin resin and 50 to 500 parts by weight of barium sulfate having an electric conductivity of 250 .mu.S/cm or less in terms of the electric conductivity of a supernatant formed when the barium sulfate is added to water, and a particle size of 0.1 to 7 .mu.m, making the melt into a film and stretching the film to 2.5 to 14 times the original area at least in the uniaxial direction.

Find Patent Forward Citations

Matsumura, Shuji. (1987). Resin compostion for porous film and film prepared therefrom (U.S. Patent No. 4699733). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4699733

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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