Patents by Inventor Alan John Handley

Alan John Handley 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).

  • Purification process
    Patent number: 5968368
    Abstract: A process for purifying a crude material containing one or more desired compounds in impure form id described. The process comprises the steps of (1) passing the crude material through a chromatography column packed with a particulate absorbent solid using a solvent comprising at least one fluorine containing compound selected from the (hydro)fluorocarbons and the (hydro)fluorocarbon ethers to transport the said crude material through the packed column, and (2) collecting the one or more desired compounds as they emerge from the column as a solution in the solvent.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: October 19, 1999
    Assignee: Imperial Chemical Industries PLC
    Inventors: Richard Llewellyn Powell, Alan John Handley, Richard Dominic Clarke
  • Purification process
    Patent number: 5824225
    Abstract: A process for purifying a crude material containing one or more desired compounds in impure form is described. The process includes the steps of (1) passing the crude material through a chromatography column packed with a particulate absorbent solid using a solvent comprising at least one fluorine containing compound selected from the (hydro)fluorocarbon ethers to transport the said crude material through the packed column, and (2) collecting the one or more desired compounds as they emerge from the column as a solution in the solvent.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: October 20, 1998
    Assignee: Imperial Chemical Industries PLC
    Inventors: Richard Llewellyn Powell, Alan John Handley, Richard Dominic Clarke