Patents by Inventor Robert L. Wickremasinghe

Robert L. Wickremasinghe 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 of making cold water soluble tea concentrates and powders
    Patent number: 4004038
    Abstract: Cold soluble tea concentrates and powders are prepared by extracting tea leaves with hot water, selectively removing nonpolyphenolic, high molecular weight compounds from the tea extract while retaining the phenolic compounds therein and concentrating the resultant extract.
    Type: Grant
    Filed: October 11, 1974
    Date of Patent: January 18, 1977
    Assignee: Tea Research Institute of Ceylon
    Inventor: Robert L. Wickremasinghe