Patents by Inventor Karl H. Popp

Karl H. Popp 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).

  • Purification of regenerated sizing liquors
    Patent number: 4331539
    Abstract: A method of processing regenerated liquors of polyacrylate, polyvinyl alcohol and carboxymethylcellulose (CMC) sizes for reuse, wherein the impurities are substantially removed, without noticeably changing the properties of the size, by constantly aerating the liquor and separating off the precipitate thereby formed.
    Type: Grant
    Filed: March 10, 1981
    Date of Patent: May 25, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Schenk, Wilfried Kothe, Karl H. Popp