Patents by Inventor Kirsten Bührke

Kirsten Bührke 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).

  • Non-aqueous inks with an extended cap-off time
    Patent number: 7758682
    Abstract: A non-aqueous ink with an extended cap-off time for writing, drawing, painting or marking, or a writing or marking fluid respectively, having organic solvents, binding agents, drying retarders, colorants and if necessary further additives. The ink contains a fatty acid or a fatty acid blend as a drying retarder.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: July 20, 2010
    Assignee: J.S. Staedtler GmbH & Co. KG
    Inventor: Kirsten Bührke