Patents by Inventor David Burrell Stearns

David Burrell Stearns 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: 4113614
    Abstract: Disclosed herein are four embodiments of a system specifically applicable to the hemodialysis procedure. Two embodiments, configured as single pass and recirculating dialysate systems, control ultrafiltration rate to a preset value and measure ultrafiltration rate and the total quantity of ultrafiltrate removed. These embodiments are useful when the filtration characteristics of the dialyzer, i.e., semipermeable membrane, are constant and known. However, when the filtration characteristics of the dialyzer, i.e., semipermeable membrane, are not constant and known, two other embodiments, configured as single pass and recirculating dialysate systems, control transmembrane pressure to a preset value and measure ultrafiltration rate and total quantity of ultrafiltrate removed. All embodiments are closed systems requiring sealed dialyzers. Each of the foregoing systems include, inter alia, a unique flow measurement pressure control unit which controls fluid pressure and simultaneously meters fluid flow therein.
    Type: Grant
    Filed: December 10, 1976
    Date of Patent: September 12, 1978
    Assignee: International Business Machines Corporation
    Inventors: Anita Hand Rollo, David Burrell Stearns