Patents by Inventor Edwin J. Siegman

Edwin J. Siegman 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).

  • Spinning process
    Patent number: 4317790
    Abstract: A spinnerette assembly wherein tapered passageways and distribution chambers of diminishing length are so arranged as to provide equal back pressure over all orifices thereby providing extrudates of improved uniformity of diameter after stretching.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: March 2, 1982
    Assignee: American Cyanamid Company
    Inventors: Edwin J. Siegman, Roy L. Yelverton
  • Spinning process for nylon 4 fiber
    Patent number: 4301106
    Abstract: A single phase fusion melt of nylon 4 and water when extruded through a spinneret to form a filament which is stretched provided a fiber of good physical properties without deterioration of the fiber-forming polymer.
    Type: Grant
    Filed: April 21, 1980
    Date of Patent: November 17, 1981
    Assignee: American Cyanamid Company
    Inventors: Denis Coleman, Edwin J. Siegman
  • Process for spinning poly(polymethylene terephthalamide) fiber
    Patent number: 4301105
    Abstract: Extruding a homogeneous single phase fusion melt of a poly(polymethylene phthalamide) and water through a spinneret to form filaments and stretching the resulting filaments provides fiber of desirable physical properties without significant lowering of the molecular weight of the polymer forming the fiber.
    Type: Grant
    Filed: April 21, 1980
    Date of Patent: November 17, 1981
    Assignee: American Cyanamid Company
    Inventors: Denis Coleman, Edwin J. Siegman
  • Spinnerette assembly
    Patent number: 4276011
    Abstract: A spinerette assembly wherein tapered passageways and distribution chambers of diminishing length are so arranged as to provide equal back pressure over all orifices thereby providing extrudates of improved uniformity of diameter after stretching.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: June 30, 1981
    Assignee: American Cyanamid Company
    Inventors: Edwin J. Siegman, Roy L. Yelverton
  • Purging for spinning hydrated acrylic polymer melt
    Patent number: 4226817
    Abstract: An acrylonitrile polymer composition containing ethylene carbonate and optionally small amounts of water is an effective purge material for start-up and shut-down of melt spinning operations employing hydrated acrylonitrile polymer melts.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: October 7, 1980
    Assignee: American Cyanamid Company
    Inventor: Edwin J. Siegman