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:
Jul. 02, 2002
Filed:
Jun. 19, 1999
Applicant:
Inventors:
Michael Berger, Wachtberg, DE;
Michael Krüger, Tübingen, DE;
Markus Thönissen, Nettetal, DE;
Rüdiger Arens-Fischer, Aachen, DE;
Hans Lüth, Aachen, DE;
Walter Lang, VS-Villingen, DE;
Wolfgang Theiss, Aachen, DE;
Stefan Hilbrich, Herzogenrath, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23H 3/00 ; B23H 5/00 ; C25F 3/00 ; C25F 7/00 ; H05K 3/07 ;
U.S. Cl.
CPC ...
B23H 3/00 ; B23H 5/00 ; C25F 3/00 ; C25F 7/00 ; H05K 3/07 ;
Abstract
An interference filter having a layer with an area consisting of a porous material extending from the surface of the layer to the interior, the dimensions of the porous layer area in a direction normal to the layer surface have different values to provide for varying reflection or, respectively, transmission characteristics.