Patents by Inventor Lawrence K. Locke

Lawrence K. Locke 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).

  • Food package, retort lidding, and coextruded film therefor
    Patent number: 5273797
    Abstract: A seal layer for use in heat sealed containers, especially retortable polymer containers. A semirigid or rigid packaging container with a multilayer laminate heat sealed to a tray flange, the laminate having a barrier layer and the lidding being easily opened by cohesive failure of a layer containing as elastomer. The elastomer is preferably PIB in a heat seal film layer on a polypropylene tray.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: December 28, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Donald R. Hazelton, Lawrence K. Locke
  • Low gloss film and process of manufacture (FP 1323)
    Patent number: 4880682
    Abstract: A multilayer film comprises a elastomeric core layer and at least one thermoplastic skin layer having a microundulating surface configuration providing the film with a low gloss.
    Type: Grant
    Filed: March 22, 1988
    Date of Patent: November 14, 1989
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Donald R. Hazelton, Douglas J. Laurent, Lawrence K. Locke, William J. Hodgson, Jr.
  • Retort pouch and coextruded film therefor
    Patent number: 4769261
    Abstract: A seal layer for use in large institutional-sized retort pouches comprises an ABA film structure wherein the A layers are each composed of a blend of a minor amount of an elastomer and a major amount of a polyolefin, and the B layer is composed of a blend of a major amount of an elastomer and a minor amount of a polyolefin. Retort pouches made with this ABA film structure as the seal layer exhibits improved impact strength.
    Type: Grant
    Filed: January 8, 1987
    Date of Patent: September 6, 1988
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Donald R. Hazelton, Lawrence K. Locke