Patents by Inventor Roger Lee Siferd

Roger Lee Siferd 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).

  • Pipe structure and method of manufacture
    Publication number: 20040041302
    Abstract: A pipe section formed of a polymeric material which has a substantially constant thickness throughout, the terminal edge of the female connection having a reinforcement structure which rigidifies the end of the female connection and prevents deformation, the pipe section preferably having a flared end, and the reinforcement structure preferably being a semicircular channel formed at the end of the pipe section by a mandrel after initial extrusion of the pipe section; along with a method and apparatus for forming the pipe section, a pipe assembly including such pipe section, and a method of forming the pipe assembly.
    Type: Application
    Filed: August 27, 2003
    Publication date: March 4, 2004
    Inventors: Roger Lee Siferd, Matthew C. Ankrom, Larry E. Porter
  • Pipe structure and method of manufacture
    Patent number: 6660199
    Abstract: A pipe section formed of a polymeric material which has a substantially constant thickness throughout, the terminal edge of the female connection having a reinforcement structure which rigidifies the end of the female connection and prevents deformation, the pipe section preferably having a flared end, and the reinforcement structure preferably being a semicircular channel formed at the end of the pipe section by a mandrel after initial extrusion of the pipe section; along with a method and apparatus for forming the pipe section, a pipe assembly including such pipe section, and a method of forming the pipe assembly.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: December 9, 2003
    Assignee: Hancor, Inc.
    Inventors: Roger Lee Siferd, Matthew C. Ankrom, Larry E. Porter
  • Apparatus for forming a reinforcing structure on an end of a pipe
    Patent number: 6565350
    Abstract: A pipe section formed of a polymeric material which has a substantially constant thickness throughout, the terminal edge of the female connection having a reinforcement structure which rigidifies the end of the female connection and prevents deformation, the pipe section preferably having a flared end, and the reinforcement structure preferably being a semicircular channel formed at the end of the pipe section by a mandrel after initial extrusion of the pipe section; along with a method and apparatus for forming the pipe section, a pipe assembly including such pipe section, and a method of forming the pipe assembly.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: May 20, 2003
    Assignee: Hancor, Inc.
    Inventors: Roger Lee Siferd, Matthew C. Ankrom, Larry E. Porter
  • Pipe structure and method of manufacture
    Publication number: 20010013673
    Abstract: A pipe section formed of a polymeric material which has a substantially constant thickness throughout, the terminal edge of the female connection having a reinforcement structure which rigidifies the end of the female connection and prevents deformation, the pipe section preferably having a flared end, and the reinforcement structure preferably being a semicircular channel formed at the end of the pipe section by a mandrel after initial extrusion of the pipe section; along with a method and apparatus for forming the pipe section, a pipe assembly including such pipe section, and a method of forming the pipe assembly.
    Type: Application
    Filed: January 19, 2001
    Publication date: August 16, 2001
    Inventors: Roger Lee Siferd, Matthew C. Ankrom, Larry E. Porter
  • Pipe structure and method of manufacture
    Publication number: 20010013372
    Abstract: A pipe section formed of a polymeric material which has a substantially constant thickness throughout, the terminal edge of the female connection having a reinforcement structure which rigidifies the end of the female connection and prevents deformation, the pipe section preferably having a flared end, and the reinforcement structure preferably being a semicircular channel formed at the end of the pipe section by a mandrel after initial extrusion of the pipe section; along with a method and apparatus for forming the pipe section, a pipe assembly including such pipe section, and a method of forming the pipe assembly.
    Type: Application
    Filed: January 19, 2001
    Publication date: August 16, 2001
    Inventors: Roger Lee Siferd, Mathew C. Ankkrom, Larry E. Porter
  • Pipe structure and method of manufacture
    Patent number: 6199592
    Abstract: A pipe section formed of a polymeric material which has a substantially constant thickness throughout, the terminal edge of the female connection having a reinforcement structure which rigidifies the end of the female connection and prevents deformation, the pipe section preferably having a flared end, and the reinforcement structure preferably being a semicircular channel formed at the end of the pipe section by a mandrel after initial extrusion of the pipe section; along with a method and apparatus for forming the pipe section, a pipe assembly including such pipe section, and a method of forming the pipe assembly.
    Type: Grant
    Filed: February 5, 1999
    Date of Patent: March 13, 2001
    Assignee: Hancor, Inc.
    Inventors: Roger Lee Siferd, Matthew C. Ankrom, Larry E. Porter