Patents by Inventor Charles H. Geissel

Charles H. Geissel 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 of manufacturing a microporous sheet material
    Patent number: 4237083
    Abstract: A process of manufacturing a microporous sheet by forming a blend of a polyolefin, silica and a water insoluble plasticizer, forming a sheet from the blend, and contacting the sheet with water for a time sufficient to render the sheet microporous. The plasticizer, being essentially insoluble in water, is easily separated therefrom and recycled. The preferred plasticizers are dialkyl phthalates and dialkyl adipates having between about two and about eleven carbon atoms in the oxo-alcohol moiety.
    Type: Grant
    Filed: February 13, 1979
    Date of Patent: December 2, 1980
    Assignee: Evans Products Company
    Inventors: James Young, Charles H. Geissel, Piotr Zenczak