Patents by Inventor Larry D. Casey

Larry D. Casey 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 for separating solids with a keratin filter aid
    Patent number: 4869829
    Abstract: A water clarification process wherein solids are separated by filtration through a porous septum utilizes as a filter precoat a coating of keratin-composition in the form of particles wherein at least 75 weight percent of the particles have a particle size no greater than 2.0 mm. In preferred embodiment, the material to be filtered is first treated with a combination of an organic polymeric flocculant and an organic polymer coagulant.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: September 26, 1989
    Assignee: Nalco Chemical Company
    Inventor: Larry D. Casey