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:
Apr. 27, 1976
Filed:
Sep. 05, 1974
Applicant:
Inventors:
Seiichi Igarashi, Suita, JA;
Kin-ichi Shirakawa, Ibaraki, JA;
Kazuo Kimura, Kobe, JA;
Akira Ogino, Shinsenri-Higashi, JA;
Assignee:
Takeda Chemical Ind., Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D06M / ; D21H / ;
U.S. Cl.
CPC ...
8192 ; 8DIG / ; 428425 ; 428537 ; 260 / ; 260 / ;
Abstract
A paperboard impregnated with polyurethane resin having specific NCO content and average molecular weight at the rate of 0.05 to 5.0 weight percent relative to the paperboard has excellent mechanical properties such as compressive strength, tensile strength, tearing strength, folding endurance, etc., even in wet state.