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. 11, 1976
Filed:
Apr. 05, 1973
Hidemasa Honda, Tosu, JA;
Yasuhiro Yamada, Tosu, JA;
Hitoo Kakiyama, Tosu, JA;
Takeshi Imamura, Tosu, JA;
Masanao Nakagawa, Tosu, JA;
Abstract
Micro-beads having a carbonaceous structure are produced by a process comsing heating pitch at about 350-500.degree.C to form optically anisotropic spherules, extracting the resulting spherules with an organic solvent to remove substantially all remaining pitch therefrom, and then carbonizing the pitch-free spherules in a non-oxidizing atmosphere. The optically anisotropic micro-beads substantially free of pitch can be shaped to a desired form and then carbonized to produce a shaped carbonaceous structure. If the carbonizing temperature is above about 1500.degree.C, a graphite crystalline structure results.