Patents by Inventor Robert Leonard Johnson

Robert Leonard Johnson 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 the purification of nutrients from food process streams
    Patent number: 6475390
    Abstract: A separation process is described for separation of a nutrient from divalent ions of an aqueous solution. The aqueous solution is contacted with an ion exchange resin that includes monovalent ions until the concentration of divalent ions in the aqueous solution has been depleted and an eluate is collected. The eluate is then subjected to a process, preferably a nanofiltration membrane process, capable of separating monovalent ions to obtain a permeate fraction including monovalent ions and a retentate fraction including the nutrient. The retentate fraction is then separated into fractions with at least one fraction including a major portion of the nutrient. The ion exchange resin is then regenerated by contacting it with a solution including the permeate fraction until a major portion of the divalent ions have been replaced by monovalent ions.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: November 5, 2002
    Assignees: University of Western Sydney, Commonwealth Scientific and Industrial Research Organization, Dairy Research and Development Corporation
    Inventors: Rosalie Joyce Durham, James Arthur Hourigan, Robert Walter Sleigh, Robert Leonard Johnson
  • Adsorbent materials
    Patent number: 4024334
    Abstract: Cellulose esters, such as cellulose acetate and/or cellulose acetate butyrate, prepared in the form of gel beads are active as adsorbents, especially for debittering of fruit juices by removal of limonin.
    Type: Grant
    Filed: February 20, 1975
    Date of Patent: May 17, 1977
    Assignee: Commonwealth Scientific and Industrial Research Organization
    Inventors: Bruce Veness Chandler, Robert Leonard Johnson
  • Contacting citrus juice with a cellulose ester adsorbent to remove limonin
    Patent number: 3989854
    Abstract: Fruit juices are debittered by removal of limonin therefrom using cellulose esters, such as cellulose acetate and/or cellulose acetate butyrate, as adsorbents. The juices can be treated either before or after packaging into containers.
    Type: Grant
    Filed: February 20, 1975
    Date of Patent: November 2, 1976
    Assignee: Commonwealth Scientific and Industrial Research Organization
    Inventors: Bruce Veness Chandler, Robert Leonard Johnson