Patents by Inventor Jeffrey A. Jankowski

Jeffrey A. Jankowski 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).

  • Starch/cationic polymer combinations as coagulants for the mining industry
    Patent number: 6042732
    Abstract: A method for dewatering coal tailings, clean coal products and mineral slurries with an effective coagulating amount of a combination of a cationic polymer and a starch. A preferred cationic polymer is poly(dimethylaminoethylacrylate methyl chloride quaternary salt) and preferred starches are unmodified.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: March 28, 2000
    Assignee: Nalco Chemical Company
    Inventors: Jeffrey A. Jankowski, Calvin T. Tobison