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:
Sep. 14, 1999
Filed:
Nov. 07, 1997
Applicant:
Inventors:
Manfred Spies, Biedenkopf, DE;
Heike Rademacher, Hamburg, DE;
Zygmut Kozaczka, Hamburg, DE;
Klaus Eberhard Papon, Hamburg, DE;
Assignee:
Beiersdorf AG, Hamburg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
553851 ; 55DI / ; 96223 ; 96226 ;
Abstract
An air-permeable filter material for use on doors, door frames, windows or window frames and a method of using the filter material to protect against the ingress of pollen and dirt particles in the environment. The filter material may be composed of fabric or film or a combination of film and fabric, the material having perforations of a diameter of 2-250 .mu.m, and a fixing material for applying the filter material.