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:
Sep. 21, 1982
Filed:
Dec. 24, 1980
Oliver A Kiikka, Willoughby, OH (US);
Donald R Day, Garfield Heights, OH (US);
Standard Oil Company, Cleveland, OH (US);
Abstract
This invention is directed toward an improved carbon electrode having a coefficient of thermal expansion of less than 3.5.times.10.sup.-7. Composition of the electrode includes needle coke in an amount of from about 60 to 90 weight percent and a quinoline soluble binder pitch in an amount of from about 10 to 40 weight percent, having a ring and ball softening point of from about 94.degree. to 150.degree. C. consisting of a highly aromatic condensation product of a distilled cycle oil extract with an extractant selected from the group consisting of furfural, phenol, B,B'-dichloro diethyl ether, nitrobenzene and sulfur dioxide.