Patents by Inventor Charles T. Lawrence

Charles T. Lawrence 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 manufacturing welded thermoplastic stringer
    Patent number: 4331493
    Abstract: Heels of leg portions of thermoplastic coupling elements are welded to the opposite sides of a polymer film tape leaving an edge portion of the tape between diverging inside surfaces of the leg portions spaced from the welds.
    Type: Grant
    Filed: September 4, 1980
    Date of Patent: May 25, 1982
    Assignee: Talon, Inc.
    Inventor: Charles T. Lawrence
  • Method of making a slide fastener installation
    Patent number: 4327470
    Abstract: A slide fastener installation is disclosed in which the trains of coupling elements are adhesively mounted on the article into which the slide fastener is to be installed without the use of mounting tapes. In making this installation, the interlocked trains of elements are mounted on the fabric before a slit is made in the fabric to provide an opening to be closed by the slide fastener.
    Type: Grant
    Filed: July 17, 1980
    Date of Patent: May 4, 1982
    Assignee: Talon, Inc.
    Inventor: Charles T. Lawrence
  • Slide fastener installation and method of making the same
    Patent number: 4254538
    Abstract: A slide fastener installation is disclosed in which the trains of coupling elements are adhesively mounted on the article into which the slide fastener is to be installed without the use of mounting tapes. In making this installation, the interlocked trains of elements are mounted on the fabric before a slit is made in the fabric to provide an opening to be closed by the slide fastener.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: March 10, 1981
    Assignee: Textron, Inc.
    Inventor: Charles T. Lawrence
  • Welded thermoplastic stringer for slide fastener and method of manufacture
    Patent number: 4186467
    Abstract: Heels of leg portions of thermoplastic coupling elements are welded to the opposite sides of a polymer film tape leaving an edge portion of the tape between diverging inside surfaces of the leg portions spaced from the welds.
    Type: Grant
    Filed: August 22, 1977
    Date of Patent: February 5, 1980
    Assignee: Textron, Inc.
    Inventor: Charles T. Lawrence