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:
Mar. 02, 1982
Filed:
Apr. 28, 1980
Seizaburo Watanabe, Tokyo, JP;
Tsukasa Yamagishi, Suzuka, JP;
Asahi-Dow Limited, Tokyo, JP;
Abstract
Polyolefin foam having small, uniform cell size is prepared (1) by mixing a polyolefin resin with (a) a volatile organic blowing agent and (b) from about 0.1 to about 5 weight percent, based upon the polyolefin resin weight, of a cell control agent (e.g., such as amorphous silica having a pH of from 3.5 to 4.5), said cell control agent being in the form of nonporous microspheres having an average particle size of from about 5 to about 100 m.mu. and (2) by thereafter extrusion-expanding the resultant mixture.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile