Patents by Inventor David C. Cumbers

David C. Cumbers 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).

  • Non-woven fabrics
    Patent number: 4170680
    Abstract: A thermally segmentally bonded non-woven fabric having an attractive pattern of irregular bonds and a process for preparing it using heated patterned calender rolls having thereon surface patterns of lands with depressions between, one consisting of continuous lands and the other of isolated projections arranged in a particular way so that lands which oppose each other in the nip overlap to different extents.
    Type: Grant
    Filed: February 28, 1978
    Date of Patent: October 9, 1979
    Assignee: Imperial Chemical Industries Limited
    Inventor: David C. Cumbers