Patents by Inventor Johanna A. M. Huethorst

Johanna A. M. Huethorst 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).

  • Method for removing in a centrifuge a liquid from a surface of a substrate
    Patent number: 5271774
    Abstract: A method is set forth of removing a liquid (3) from a surface (2) of a substrate (1), which is placed in a centrifuge (4) and is then subjected therein to a rotary movement, the substrate being rotated at such a speed that the liquid is centrifuged from the surface. According to the invention, the substrate is brought into contact in the centrifuge with a vapour of a material which is miscible with the liquid and which, when mixed therewith, yields a mixture having a surface tension which is lower than that of the liquid. Due to this step, the quantity of material remaining on the surface is strongly reduced.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: December 21, 1993
    Assignee: U.S. Philips Corporation
    Inventors: Adriaan F. M. Leenaars, Johanna A. M. Huethorst, Johannes Marra