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:
Aug. 12, 1980
Filed:
Jun. 02, 1978
Jacques Maire, Epinay sur Seine, FR;
Jacques Fourre, Noisy le Sec, FR;
Jean P Gervais, Noisy le Sec, FR;
Le Carbone-Lorraine, Gennevilliers, FR;
Abstract
A dual-textured graphite has been produced having an apparent coarse strongly bonded grained structure (the macrotexture) in which each coarse grain is formed from a number of strongly linked ultrafine grains (the microtexture). The dimensions of the coarse grains are from 0.4 to 6.0 m.m. while those of the ultrafine grains are below 0.050 m.m. The fine grains are linked by graphitized pore-containing carbon having pores of less than 2.mu. diameter. The coarse grains are also linked by graphitized pore-containing carbon having pores of from 5 to 20.mu. diameter. Further characteristics of the graphite are a coefficient of linear expansion of 4-6.times.10.sup.-6 /.degree. C., thermal conductivity of 0.20 cal/cm/.degree. C./sec., electrical resistivity of 1500-2000.mu. ohms/cm and anisotropy factor not exceeding 1.4. A process for producing such product from pitch and petroleum or coal tar coke is described.