Patents by Inventor Lester R. Bartron

Lester R. Bartron 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).

  • Filled, biaxially oriented, thermoplastic film having preferential shrinkage and method of making such film
    Patent number: T981003
    Abstract: a filled, biaxially oriented, void-containing thermoplastic film suitable for making heat-shrinkable bands is provided having shrinkage on heating to 100.degree. C. of greater than 5%, which shrinkage in turn is at least 5% greater than the shrinkage in a direction perpendicular thereto.A process for preparing this film with its preferential shrinkage is provided including the steps of:(a) melt-blending a C.sub.2 -C.sub.10 .alpha.
    Type: Grant
    Filed: July 11, 1978
    Date of Patent: April 3, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lester R. Bartron, Samuel P. Anderson, Rudolph H. Michel