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:
May. 05, 1981
Filed:
Jun. 22, 1979
Hisatsugu Kaji, Iwaki, JP;
Iwawo Kameyama, Iwaki, JP;
Takashi Hamaguti, Iwaki, JP;
Tamotsu Miyamori, Iwaki, JP;
Kureha Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A method of producing carbon fiber by making infusible and carbonizing pitch fiber which is obtained by melt-spinning petroleum-tar pitch or coal-tar pitch, and a method of making pitch fiber infusible in an air atmosphere containing NO.sub.2, at an elevated temperature by introducing a cross-sectionally U-shaped tray with pitch fiber suspended from bars placed across an upper portion thereof into an infusible material producing furnace having gas exchanging chambers in the inlet portion and outlet portion thereof as well as at least two gas circulating means each of which comprises a combination of a blower or a fan and a heat exchanger, and retaining said tray in said furnace.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile