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:
Nov. 16, 1976
Filed:
Mar. 13, 1975
Applicant:
Inventors:
Hiroomi Matsunaga, Kobe, JA;
Kozo Tsuji, Ibaragi, all of, JA;
Masashi Watanabe, Ibaragi, all of, JA;
Assignees:
Sumitomo Chemical Company, Limited, Osaka, JA;
Hayashibara Biochemical Laboratories, Incorporated, BOTH OF, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ; B29D / ;
U.S. Cl.
CPC ...
264 49 ; 260 / ; 260 / ; 264175 ;
Abstract
A porous thermoplastic resin sheet is obtained by molding into a sheet a mixture comprising 100 parts by weight of a thermoplastic resin and 0.1 to 50 parts by weight of a pullulan powder, and then immersing the resulting thermoplastic resin sheet in water to dissolve-out and remove the said pullulan powder.