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. 11, 1985
Filed:
May. 19, 1982
Applicant:
Inventors:
Nobuo Fukushima, Otsu, JP;
Yoshihiko Kitagawa, Toyonaka, JP;
Takuzo Okumura, Ibaraki, JP;
Kazuaki Sakakura, Moriguchi, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
521143 ; 264 53 ; 264D / ; 521 79 ;
Abstract
A process for producing a highly expanded polypropylene foam which is uniform in viscosity during extrusion foaming, improved in melt strength and free from unevenness of surface by using a polypropylene resin having a specified melt tension.