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:
Jan. 29, 1980
Filed:
Dec. 14, 1977
Applicant:
Inventor:
Louis C Rubens, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
2041592 ; 20415918 ; 521 95 ; 521143 ; 521915 ;
Abstract
Foamed radiation-crosslinked high density polyethylenes having substantially closed cells and uniform structure are made from radiation-crosslinked high density polyethylene compositions comprising thermosensitive foaming agents by heating such compositions while excluding molecular oxygen from contact therewith during that heating and foaming step. Oxygen is excluded by providing an oxygen-free inert gas atmosphere or by submerging the foamable material beneath the surface of a body of liquid heat transfer medium during the heating and foaming step.