Patents by Inventor Hans Husemeyer

Hans Husemeyer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Agent for dyeing hair
    Patent number: 4840639
    Abstract: Oxidative hair dyeing preparation having a content of a 1-hydroxyalkyl-2,5-diaminobenzene having the formula ##STR1## as developing substance, wherein R denotes hydroxyalkyl having 1 to 4 carbon atoms, or their salts with inorganic or organic acids. Preferably, these hair dyeing preparations will contain 1-hydroxymethyl-2,5-diaminobenzene in a concentration of approximately 0.1 to 3.0 percent by weight, this either alone as a developing substance, or in combination with the conventional coupling substances.
    Type: Grant
    Filed: June 7, 1988
    Date of Patent: June 20, 1989
    Assignee: Wella Aktiengesellschaft
    Inventors: Hans Husemeyer, Herbert Mager, Eugen Konrad
  • Process for dyeing hair and composition therefor
    Patent number: 4452603
    Abstract: The object of the invention is a composition and a process for the oxidative dyeing of hair on the basis of a 1-(3-hydroxyalkyl)-2,4-diaminobenzene as coupler substance.
    Type: Grant
    Filed: July 17, 1980
    Date of Patent: June 5, 1984
    Assignee: Wella Aktiengesellschaft
    Inventors: Eugen Konrad, Hans Husemeyer, Herbert Mager
  • Hair dye
    Patent number: 3973900
    Abstract: Hair dyeing compositions containing a dye which has the formula ##SPC1##Wherein R.sub.1 and R.sub.2 are each hydrogen or hydroxy ethyl alone or in conjunction with an oxidation and/or direct dyeing dye. The hair dyeing compositions can also include the conventional additives such as water soluble surface active agents, thickening agents, complex formers, antioxidants, softeners, perfumes, and the like.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: August 10, 1976
    Assignee: Wella AG
    Inventors: Hans Husemeyer, Eugene Konrad