Patents by Inventor Ray J. R. Lo

Ray J. R. Lo 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).

  • Microsphere reservoirs for controlled release application
    Patent number: 5725869
    Abstract: Microspheres, optionally containing an ingredient to be dispensed through controlled release, are prepared by solvent evaporation of an oil-in-water emulsion formed from an organic solvent containing a polymer and a plasticizer and an aqueous solution containing one or more emulsifying agents. The microcapsules formed have a size of between about 3 and about 300 microns in diameter and are porous and spongy in structure as opposed to the hollow core, relatively solid surface structure of microspheres formed by solvent evaporation without utilizing a plasticizer. The microspheres can have a relatively high loading rate of an ingredient to be dispensed combined with a relatively low release rate and are useful for instance for agricultural chemicals, pharmaceuticals or medicines, cosmetics or fragrances.
    Type: Grant
    Filed: October 24, 1996
    Date of Patent: March 10, 1998
    Assignee: Zeneca Limited
    Inventor: Ray J. R. Lo
  • Solid herbicidal compositions containing N-phosphonomethylglycine
    Patent number: 5514641
    Abstract: Solid herbicidal compositions contain N-phosphonomethylglycine and an alkyl phenol polyoxyethylene surfactant containing from about 50 to about 90 weight percent of an alkyl phenol polyoxyethylene carboxylic acid.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: May 7, 1996
    Assignee: Zeneca Limited
    Inventors: Ray J. R. Lo, Candice W. Huang