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. 26, 1989
Filed:
Jun. 30, 1988
Applicant:
Inventors:
Yasushi Sakai, Yokkaichi, JP;
Tetsuo Fujii, Tokuyama, JP;
Michio Saito, Yokkaichi, JP;
Motoaki Munekata, Yokkaichi, JP;
Akio Kiyohara, Yokkaichi, JP;
Assignee:
Tosoh Corporation, Shin-nanyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526237 ; 208 71 ; 526290 ; 585330 ;
Abstract
A process for producing a light color high softening point hydrocarbon resin, which comprises polymerizing an oil fraction obtained by condensing a fractionated component withdrawn in a gas phase from a recovery section of a fractionating tower located below the feeding section and above the bottom of the tower during the fractional distillation in the tower of a feed oil fraction having a boiling point within a range of from 140.degree. to 280.degree. C. selected among cracked oil fractions obtained by thermal cracking of petroleum.