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:
Oct. 16, 1990
Filed:
Mar. 14, 1988
Bodo Hildebrandt, Riedstadt, DE;
Wella Aktiengesellschaft, Darmstadt, DE;
Abstract
An arrangement for treating hair with a liquid in a circulating process, comprises a circulating pump, an electric motor arranged to drive the circulating pump, a treatment time determining device, at least one treatment start switch arranged to control the treatment time determining device, the treatment time determing device being connected with the electric motor so that the electric motor is turned off at a treatment end, and a sensing element arranged to sense a parameter of a treatment liquid and operative so that the treatment time determining device is controlled through the sensing element in dependence upon the parameter of the treatment liquid which no longer substantially changes.