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:
Jan. 05, 1993
Filed:
Dec. 23, 1991
Applicant:
Inventors:
Dieter Krahl, Berlin, DE;
Hans Patzold, Berlin, DE;
Albrecht Rilk, Konigsbronn, DE;
Johannes Bihr, Aalen, DE;
Assignee:
Carl-Zeiss-Stiftung, Heidenheim, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250305 ; 2503 / ; 250298 ; 250311 ;
Abstract
The invention is directed to an electron energy filter which is assembled from three or four plates placed together in a sandwich-like configuration. The pole pieces are seated on the inner sides of the outer plates and attached thereto. The pole pieces can therefore be produced in pairs so that their outer surfaces match precisely. This assembly is economical and provides a precise manufacture.