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:
May. 30, 1995
Filed:
Jun. 23, 1993
Applicant:
Inventors:
Kiyoshi Hase, Nagaokakyo, JP;
Akira Ando, Nagaokakyo, JP;
Yasunobu Yoneda, Nagaokakyo, JP;
Toshihiko Kittaka, deceased, late of Ibaraki, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
252 629 ; 501136 ; 501138 ; 501139 ; 501152 ;
Abstract
Disclosed herein are piezoelectric ceramics composed of lead titanate zirconate, which is expressed in PbZr.sub.1-z Ti.sub.z O.sub.3, where z=0.45 to 0.54, with 0.1 to 8 mole percent of the Pb atoms being replaced with at least one element selected from a group of Ca, Sr and Ba, and containing Mn in a range of 0.005 to 0.9 percent by weight of the whole in terms of MnO.sub.2.