Patents by Inventor Wayne M. Swantak

Wayne M. Swantak 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).

  • Method of extending the storage life of cut lettuce
    Patent number: 3987208
    Abstract: Treating lettuce for use in salads and the like to extend the storage life f said lettuce to at least about 4 weeks under refrigeration. The lettuce leaves are subdivided by cutting and treated with an aqueous solution of sodium meta bisulfite, citric acid, ascorbic acid, and potassium sorbate. Excess solution is removed from the cut lettuce, which then is enclosed in plastic bags made of vinylidine chloride-vinyl acetate copolymer film having low rates of transmission of oxygen, carbon dioxide, and water vapor. The plastic bags of treated cut lettuce are tightly closed to prevent intermixing of outside air with the interior atmosphere of the bags and the treated cut lettuce, and they are stored at about 1.7.degree. .+-. 1.0.
    Type: Grant
    Filed: March 25, 1976
    Date of Patent: October 19, 1976
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Abdul R. Rahman, Glenn R. Schafer, Wayne M. Swantak, Kenneth M. Plummer