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:
Feb. 10, 1976
Filed:
Oct. 18, 1973
Applicant:
Inventors:
Shozo Horikiri, Amagasaki, JA;
Jiro Iseki, Toyonaka, JA;
Masao Minobe, Ibaraki, JA;
Chikanao Kawai, Amagasaki, JA;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264 29 ; 423449 ;
Abstract
A process for the production of carbon micro-balloons and carbon micro-spheres which comprises reacting polymeric microparticles with sulfuric anhydride or chlorosulfonic acid so as to make the surface layer or the whole of the micro-particles infusible and then carbonizing the obtained micro-particles by heating them at a temperature above the decomposition point of the starting polymer.