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. 15, 2004
Filed:
Sep. 03, 2002
Applicant:
Inventors:
Takeshi Saitou, Shimodate, JP;
Akinori Hanawa, Shimotsuma, JP;
Takashi Matsuzaki, Kawachi-gun, JP;
Morimichi Sudou, Makabe-gun, JP;
Assignee:
Hitachi Chemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D 3/02 ;
U.S. Cl.
CPC ...
B05D 3/02 ;
Abstract
There are disclosed a method of preparing a prepreg comprising the steps of a impregnation process in which a thermosetting resin varnish is impregnated into a fiber base material and a drying step in which a solvent of the impregnated thermosetting resin varnish in the fiber base material is vaporized and the resin is semi-cured, wherein the drying step is carried out by moving the fiber base material into which the thermosetting resin varnish is impregnated with a tensile force of 3.0 N/cm or less; and a prepreg prepared by the method.