Patents by Inventor Ernst de Ruiter

Ernst de Ruiter 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).

  • Filter sheet material and method of making same
    Patent number: 4455187
    Abstract: The invention relates to a filter sheet material composed of an air-permeable, flexible, especially textile supporting layer, on which there is imprinted in a certain pattern a mixture containing an adsorbent in powder form and a polymeric binding agent, the adsorbent covering up to 90% of the surface of the supporting layer. The invention furthermore relates to the use of such filter sheet materials with active carbon as adsorbent for protective clothing, and to the preparation of the material by rotary screen printing from a paste made of the powdered adsorbent and a dispersion of the polymeric binding agent.
    Type: Grant
    Filed: August 26, 1982
    Date of Patent: June 19, 1984
    Inventors: Hubert von Blucher, Hasso von Blucher, Ernst de Ruiter