Patents by Inventor Walter Brent Aitken

Walter Brent Aitken 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).

  • Stabilization of phosphoenol pyruvate carboxylase
    Patent number: 3963578
    Abstract: Phosphoenol pyruvate carboxylase is stabilized to have a shelf life of six months or more by incorporating the phosphoenal pyruvate carboxylase in an aqueous solution containing from 0.002 to 0.05 molar sodium phosphate, from 1 to 10, and preferably 3 to 8, m molar aspartate, from 0.02 to 0.1 m molar ethylene diamine tetraacetic acid, from 0.6 to 3.15, and preferably 0.8 to 1.2, molar ammonium sulfate and up to 20 volume percent glycerol. The sodium phosphate acts as a buffer to maintain the pH of the solution at from 6.0 to 6.8.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: June 15, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Walter Brent Aitken, Ronald Wayne Bussian, Robert Carroll Menson, Venkatachalam Narayanswamy