Patents by Inventor Petra Hofmeister

Petra Hofmeister 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).

  • Process for providing catalytically active platinum metal layers
    Patent number: 5855959
    Abstract: A process for depositing catalytically active platinum metal layers from an ionogenic, acidic, platinum metal ions-containing solution which further contains sulfonic acid. This activation leads to more uniform catalyst layers with greater surfaces which are catalytically more efficient. The process according to the invention can be implemented in any chemical process utilizing platinum metal catalysts, e.g. chemical synthesis, environment applications or metallization of surfaces.
    Type: Grant
    Filed: April 2, 1993
    Date of Patent: January 5, 1999
    Assignee: International Business Machines Corporation
    Inventors: Juergen Boecker, Michael Butz, Alfred Frey, Petra Hofmeister, Hans Dieter Schmidt
  • Solution for providing catalytically active platinum metal layers
    Patent number: 5624479
    Abstract: A process for depositing catalytically active platinum metal layers from an ionogenic, acidic, platinum metal ions-containing solution which further contains sulfonic acid. This activation leads to more uniform catalyst layers with greater surfaces which are catalytically more efficient. The process according to the invention can be implemented in any chemical process utilizing platinum metal catalysts, e.g. chemical synthesis, environment applications or metallization of surfaces.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: April 29, 1997
    Assignee: International Business Machines Corporation
    Inventors: Juergen Boecker, Michael Butz, Alfred Frey, Petra Hofmeister, Hans D. Schmidt