Patents by Inventor Donald K. Todd

Donald K. Todd 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).

  • Hyperfiltration scoop apparatus and method
    Patent number: 4218314
    Abstract: The efficiency of membrane separation is enhanced in a hyperfiltration process by scooping off controlled amounts of the boundary layer at desired points along the flow path where useful concentrations have been achieved avoiding the necessity of bringing the entire flow up to desired concentration. The use of porous stainless steel supports with membranes formed therein in situ after fabrication from the pipe sections in a single pass configuration is especially advantageous with scoop apparatus spaced along the length of the stainless supports.
    Type: Grant
    Filed: July 20, 1978
    Date of Patent: August 19, 1980
    Inventors: James P. Schubert, Donald K. Todd
  • Hyperfiltration apparatus and method of fluid treatment
    Patent number: 4200533
    Abstract: A membrane separation apparatus utilizing hyperfiltration for permitting passage of a filtrate therethrough while rejecting a concentrated liquid medium is provided utilizing porous stainless steel membrane supports, wherein these supports are fabricated into a single pass configuration adapted for use at high pressures and substantial lengths, and wherein membrane is deposited in situ upon said supports after fabrication.
    Type: Grant
    Filed: June 28, 1978
    Date of Patent: April 29, 1980
    Inventors: Joseph L. Gaddis, Craig A. Brandon, Donald K. Todd