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. 08, 2022
Filed:
Mar. 22, 2018
Kaneka Corporation, Osaka, JP;
Japan Aerospace Exploration Agency, Chofu, JP;
Yoshio Furukawa, Settu, JP;
Takefumi Furuta, Settu, JP;
Takeshi Chiba, Settu, JP;
Rikio Yokota, Settu, JP;
Yuichi Ishida, Chofu, JP;
KANEKA CORPORATION, Osaka, JP;
JAPAN AEROSPACE EXPLORATION AGENCY, Chofu, JP;
Abstract
An object of the present invention is to reduce or eliminate a defect (e.g., a void) by achieving (i) a semipreg and a prepreg each of which allows a reduction in residual volatile component and (ii) methods for producing the semipreg and the prepreg, respectively, and consequently to achieve (iii) a fiber-reinforced composite material which has high heat resistance and superior mechanical strength and a (iv) a method for producing the fiber-reinforced composite material. The present invention attains the above object by providing, for example, a semipreg containing: powders of an imide oligomer; and reinforcement fibers, the imide oligomer being represented by a specific general formula (1).