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:
Oct. 04, 1983
Filed:
Jan. 08, 1982
Applicant:
Inventors:
Rodrigo A Garcia, Pasadena, TX (US);
Roel Moreno, Houston, TX (US);
Robert J Martinovich, Bartlesville, OK (US);
Assignee:
Phillips Petroleum Company, Bartlesville, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29H / ;
U.S. Cl.
CPC ...
264 54 ; 264 453 ; 264 53 ; 264D / ; 264D / ; 521 79 ; 521907 ; 521 92 ; 521143 ; 521144 ;
Abstract
Compositions comprising propylene polymer, e.g., polypropylene, and hydrated alumina as filler precursor and sole blowing agent, wherein the alumina can be 30 to 60 weight percent of the total composition, are converted into foam having a fine and uniform cellular structure by passage through an unvented extruder at specified temperature profiles and pressures.