Patents by Inventor William P. Colman

William P. Colman 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).

  • Patent number: 4605689
    Abstract: A process is disclosed for converting polyacrylamide gel into dilute aqueous solutions suitable for use in secondary oil recovery. Polyacrylamide gel is initially converted into a slurry of small gel particles in water from which forms a homogeneous solution concentrate which is then readily diluted to give the final drive fluid without any significant polymer degradation. The process may additionally be adapted to the drilling site or to other on site operations requiring polyacrylamide solutions such as water treating, mining or paper making.
    Type: Grant
    Filed: November 28, 1984
    Date of Patent: August 12, 1986
    Assignee: American Cyanamid Company
    Inventors: John M. Witheford, Joseph J. Pellon, William P. Colman