Patents by Inventor Devender Swaroop

Devender Swaroop 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).

  • Patent number: 6544374
    Abstract: A method for making laminated roofing shingles includes providing a substantially continuous sheet of shingle material, cutting the sheet material at a first cutting station to define a first pair of longitudinal strips having interdigitating tabs with a first pattern length, further cutting the sheet to define a second pair of longitudinal strips, further cutting the sheet at a second cutting station to define a third pair of strips having interdigitating tabs with a second pattern length, laminating together one of the first pair of strips, one of the second pair of strips and one of the third pair of strips in overlapping relation to form a substantially continuous three-layer laminated strip in which one of the second pair of strips is the lowermost layer and having the tabs of the remaining two strips oriented in a common lateral direction, and cutting the laminated strip into uniform longitudinal lengths whereby laminated roofing shingles are made.
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: April 8, 2003
    Assignee: Tamko Roofing Products
    Inventors: Thomas M. King, Devender Swaroop
  • Publication number: 20010000587
    Abstract: A method for making laminated roofing shingles includes providing a substantially continuous sheet of shingle material, cutting the sheet material at a first cutting station to define a first pair of longitudinal strips having interdigitating tabs with a first pattern length, further cutting the sheet to define a second pair of longitudinal strips, further cutting the sheet at a second cutting station to define a third pair of strips having interdigitating tabs with a second pattern length, laminating together one of the first pair of strips, one of the second pair of strips and one of the third pair of strips in overlapping relation to form a substantially continuous three-layer laminated strip in which one of the second pair of strips is the lowermost layer and having the tabs of the remaining two strips oriented in a common lateral direction, and cutting the laminated strip into uniform longitudinal lengths whereby laminated roofing shingles are made.
    Type: Application
    Filed: December 18, 2000
    Publication date: May 3, 2001
    Inventors: Thomas M. King, Devender Swaroop
  • Patent number: 6220329
    Abstract: A method and apparatus for making laminated roofing shingles includes providing a substantially continuous sheet of shingle material, cutting the sheet material at a first cutting station to define a first pair of longitudinal strips having interdigitating tabs with a first pattern length, further cutting the sheet to define a second pair of longitudinal strips, further cutting the sheet at a second cutting station to define a third pair of strips having interdigitating tabs with a second pattern length, laminating together one of the first pair of strips, one of the second pair of strips and one of the third pair of strips in overlapping relation to form a substantially continuous three-layer laminated strip in which one of the second pair of strips is the lowermost layer and having the tabs of the remaining two strips oriented in a common lateral direction, and cutting the laminated strip into uniform longitudinal lengths whereby laminated roofing shingles are made.
    Type: Grant
    Filed: March 17, 1998
    Date of Patent: April 24, 2001
    Assignee: Tamko Roofin Products
    Inventors: Thomas M. King, Devender Swaroop