Patents by Inventor Stefan Andreas Quaiser

Stefan Andreas Quaiser 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).

  • Electrochemical reduction of metal salts as a method of preparing highly dispersed metal colloids and substrate fixed clusters by electrochemical reduction of metal salts
    Patent number: 5925463
    Abstract: The object of the invention is a method for the electrochemical preparation of metal colloids with particle sizes of less than 30 nm, characterized in that one or more metals of groups Ib, IIb, III, IV, V, VI, VIIb, VIII, lanthanoides, and/or actinoides of the periodic table are cathodically reduced in the presence of a stabilizer, optionally with a supporting electrolyte being added, in organic solvents or in solvent mixtures of organic solvents and/or water within a temperature range of between -78.degree. C. and +120.degree. C. to form metal colloidal solutions or redispersible metal colloid powders, optionally in the presence of inert substrates and/or soluble metal salts of the respective metals.The invention further relates to soluble or redispersible colloids as well as application on substrates and immobilization thereof, in particular for the preparation of catalysts.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: July 20, 1999
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Manfred T. Reetz, Wolfgang Helbig, Stefan Andreas Quaiser