Patents by Inventor Frederick W. Gander

Frederick W. Gander 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).

  • Polyethylene terephthalate/terpolymer blends; films, sheets, and articles made using such blends; and method of making trays using such sheets
    Patent number: 4020126
    Abstract: Blends are provided including:99 to 95% polyethylene terephthalate and1 to 5% of a terpolymer of at least 65% ethylene with (a) at least 5% by weight of a vinyl ester of a lower (1-6 carbon) saturated monobasic aliphatic carboxylic acid and (b) 0.5 to 10% by weight of an acid of the group consisting of acrylic and methacrylic acids, said terpolymer having been made by a free-radical initiated polymerization of a mixture of ethylene, said ester and said acid.Articles, such as cooking containers or trays, are provided made using such polyethylene terephthalate/terpolymer blends or made using sheets made from such blends. Such trays may be used for cooking food at temperatures up to about 400.degree. F.Methods are provided of making such trays including thermoforming such sheets made from such blends.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: April 26, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Frederick W. Gander, Erhard F. Hoegger, William P. Kane