Patents by Inventor Daniel M. Spearman

Daniel M. Spearman 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).

  • Reinforced filter tube and method of making the same
    Patent number: 4836931
    Abstract: There is disclosed a porous, vacuum formed filter tube having randomly oriented glass fibers and having at least one layer of a suitable sheet material wrapped around said porous filter tube and being in intimate contact therewith, said disclosed combination having an outer support structure of a predetermined inside diameter sufficient to compress the assembly of said porous filter tube and said material when it is slipped thereover, thus providing compression from the outside to the inside and forcing the layer of sheet material into intimate contact at virtually all points with said porous filter tube.
    Type: Grant
    Filed: April 16, 1986
    Date of Patent: June 6, 1989
    Assignee: Porous Media Corporation
    Inventors: Michael R. Spearman, Patrick R. Spearman, Daniel M. Spearman
  • Method of making a reinforced filter tube
    Patent number: 4814033
    Abstract: There is disclosed a method of making porous, vacuum formed filter tube having randomly oriented glass fibers and having at least one layer of a suitable sheet material wrapped around said porous filter tube and being in intimate contact therewith, said disclosed combination having an outer support structure of a predetermined inside diameter sufficient to compress the assembly of said porous filter tube and said sheet material when it is slipped thereover, thus providing compression from the outside to the inside and forcing the layer of sheet material into intimate contact at vertually all points with said porous filter tube.
    Type: Grant
    Filed: February 6, 1987
    Date of Patent: March 21, 1989
    Assignee: Porous Media Corporation
    Inventors: Michael R. Spearman, Patrick R. Spearman, Daniel M. Spearman
  • Inlet filter
    Patent number: D410727
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: June 8, 1999
    Assignee: Porous Media Corporation
    Inventors: Chaouki A. Khamis, Carl M. Geisz, Daniel M. Spearman, Michael R. Spearman