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. 22, 2009
Filed:
Jul. 19, 2004
Pedro Stange, Eppstein, DE;
Klaus Horbaschek, Frankfurt am Main, DE;
Pedro Stange, Eppstein, DE;
Klaus Horbaschek, Frankfurt am Main, DE;
Braun GmbH, Kronberg, DE;
Abstract
The invention relates to a display device () for time-dependent processes, especially for displaying the change of a used toothbrush. The display device () consists of a storage chamber () containing a liquid and a porous indicator strip (), which is provided at one point with a dye () which dissolves in the liquid (), which after dissolving in the liquid (), colors the indicator strip () time-dependently over its length. The material of the indicator strip (), the liquid () and the dye () are matched to one another such that dye molecules () can adhere to the indicator strip () until the boundary surfaces () of the pores () are covered with dye molecules () while the remainder of the dye molecules () diffuse further in the liquid () and the adhesion process thus proceeds time-dependently. This produces a sharp color front.