Patents by Inventor Chen S. Fong

Chen S. Fong 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).

  • Protein degraded pre-vulcanized natural rubber coated slow release fertilizers
    Patent number: 4549897
    Abstract: An agricultural material composition comprises particles of an agricultural material, e.g. a fertilizer, coated with a layer of protein degraded pre-vulcanized natural rubber to provide slow-release properties. The particles preferably have a diameter of from 0.5 to 12 mm, and the thickness of the rubber layer is preferably from 10 to 250 microns.
    Type: Grant
    Filed: August 17, 1982
    Date of Patent: October 29, 1985
    Assignee: Petroliam Nasional Berhad
    Inventors: Yeoh C. Seng, Chen S. Fong