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. 07, 1978
Filed:
Feb. 14, 1977
Applicant:
Inventors:
Assignee:
Kureha Kagaku Kogyo Kubushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
260 4224 ; 264175 ; 2642 / ; 264288 ; 264289 ; 428910 ;
Abstract
A pervious sheet of a polyolefin composition containing 50-85 wt.% of an inorganic material such as calcium sulfite is disclosed. The calcium sulfite is preferably employed in the form of the crystalline semi-hydrate, with the crystals being in the rectangular form having a short axis of 1-30 .mu. and a long axis of 5-100 .mu.. Also disclosed is a method for the manufacture of these compositions.