Wenderoth, Lind & Ponack
Production of carbon fibers having high anisotropy
 In the production of carbon shaped articles such as fibers having high molecular orientation, anisotropy, strength, and modulus of elasticity through the steps of forming raw material pitch into fibers, infusibilization of the same followed by carbonization optionally graphitization, a raw material pitch having particular physical properties such as melt viscosity of 0.4 to 700 poises at a temperature range of 320.degree. to 480.degree. C, eminent structural anisotropy, and fluidity is used to produce such fibers product. 
Kureha Kagaku Kogyo Kabushiki Kaisha Toyo Boseki Kabushiki Kaisha
C C C D
C04B C10C C01B D01F
inventional inventional inventional inventional
Shoji Tadashi Sugio
Watanabe Araki Otani