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:
Nov. 28, 2000
Filed:
Dec. 09, 1997
Applicant:
Inventors:
Toshio Shibata, Kani-Gun, JP;
Shigeo Ito, Kani-Gun, JP;
Kazuhiro Mizuno, Mizunami, JP;
Yasuhiro Terashima, Yokohama, JP;
Yuji Nakagawa, Yokohama, JP;
Keita Inoue, Yokohama, JP;
Norihiko Orita, Yokohama, JP;
Tetsuo Takahashi, Yokohama, JP;
Kazuo Yamamura, Yokohama, JP;
Assignee:
NGK Insulators, Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F22B / ;
U.S. Cl.
CPC ...
122512 ; 122D / ; 432234 ; 432236 ; 432246 ;
Abstract
A boiler tube protector having a cylindrical or semi-cylindrical shape and adapted to be attached around an outer peripheral face of a boiler tube with mortar, which boiler tube protector includes a plurality of ceramic bodies closely arranged along their parting planes, wherein the parting planes includes a restraining portion for restraining slippage of each of the ceramic bodies.