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:
Jun. 12, 1984
Filed:
Feb. 07, 1983
Applicant:
Inventors:
Walter Fickel, Erlenbach, DE;
Gerhard Ries, Obernburg, DE;
Assignee:
Akzo nv, Arnhem, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
428402 ; 521 56 ; 521 61 ; 521 62 ; 521143 ; 521 60 ;
Abstract
Porous, powdery polypropylene is disclosed, obtained by providing a hot solution of polypropylene in pentaerythrol ester as solvent, slowly cooling said solution down to approximately room temperature to provide a solidified mass with or without affecting mechanical size reduction of said solidified mass, and extracting said solidified mass with an extractant in which pentaerythrol is soluble, with or without subsequently removing said solvent to a high degree.