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. 11, 1976
Filed:
Jan. 10, 1975
Applicant:
Inventors:
Robert W Weinert, Monroeville, PA (US);
Thelma J Isaacs, Murrysville, PA (US);
Assignee:
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H / ; H01L / ; B01J / ;
U.S. Cl.
CPC ...
333 / ; 252 629 ; 310-95 ;
Abstract
Crystals or Tl.sub.3 VS.sub.4, Tl.sub.3 VSe.sub.4, Tl.sub.3 NbS.sub.4, Tl.sub.3 NbSe.sub.4, Tl.sub.3 TaS.sub.4, and Tl.sub.3 TaSe.sub.4 are disclosed which have a surface containing of normal to a zero temperature coefficient of delay direction. The crystals are used to transmit acoustic waves in surface and bulk wave devices.