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, 2010
Filed:
Mar. 03, 2009
Applicants:
Masahiro Inui, Takarazuka, JP;
Kaoru Hamada, Sanda, JP;
Kenji Otsubo, Neyagawa, JP;
Inventors:
Assignee:
Kubota Corporation, Osaka-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 4/04 (2006.01); C10G 9/14 (2006.01); F28F 1/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A cracking tube () for use in thermal cracking furnaces for producing ethylene or the like has fins () formed on an inner surface thereof and inclined with respect to an axis of the tube for stirring a fluid inside the tube. The fins are arranged discretely on one or a plurality of helical loci, and the tube inner surface has regions (Z) wherein no fins are present over the entire axial length of the tube from one axial end of the tube to the other axial end thereof.