Patents by Inventor David M. Hall

David M. Hall 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: 4869951
    Abstract: A yarn which is a blend of from 98.01% by weight of a conventional textile fiber or filament and from 2 to about 0.09% by weight of a non-linear anti-static carbonaceous filament or fiber.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: September 26, 1989
    Assignee: The Dow Chemical Company
    Inventors: Francis P. McCullough, Jr., David M. Hall
  • Patent number: 4869962
    Abstract: A non-flammable light weight non-carcinogenic asbestos-like thermal insulation and flame barrier structure comprising at least one layer of carbonaceous fibers and a suitable binder, said carbonaceous fibers being non-linear and having a reversible deflection ratio of greater than 1.2:1, an aspect ratio of greater then 10:1 and an LOI value of greater than 40.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: September 26, 1989
    Assignee: The Dow Chemical Company
    Inventors: Francis P. McCullough, Jr., Eckel R. Lane, Bhuvenesh C. Goswami, David M. Hall
  • Patent number: 4844974
    Abstract: An antislosh, flame arresting structure for use in or with containers holding flammable fluids comprising a multiplicity of heat set carbonaceous fibers having an LOI value greater than 40 in an amount effective for preventing sloshing of the fluids and capable of arresting a flame front.
    Type: Grant
    Filed: November 18, 1987
    Date of Patent: July 4, 1989
    Assignee: The Dow Chemical Company
    Inventors: Francis P. McCullough, Jr., R. Vernon Snelgrove, Eckel R. Lane, David M. Hall
  • Patent number: 4837076
    Abstract: The invention provides a non-flammable non-linear elongatable carbonaceous fiber having a reversible deflection of greater than 1.2:1 and an aspect ratio of greater than 10:1 which may be formed into a resilient structure and the method of preparing said fiber.
    Type: Grant
    Filed: October 22, 1987
    Date of Patent: June 6, 1989
    Assignee: The Dow Chemical Company
    Inventors: Francis P. McCullough, Jr., David M. Hall
  • Patent number: 4756941
    Abstract: There is described an electroconductive tow or yarn, made from continuous filaments or staple fibers yarns, prepared from stabilized petroleum pitch, coal tar pitch or a synthetic fiber forming material which on at least partial carbonization is electroconductive, for example, polyacrylonitrile, are formed into coil-like fibers or filaments by winding the tow or yarn on a mandrel, but preferably by knitting the tow or yarn into a cloth, and heat treating the so formed tow or yarn to a carbonizing temperature (450.degree. C. to about 1500.degree. C.) to set a coilure (a non-textile crimp) therein as well as electroconductance thereto, and incorporating the coilure structure into scrim yarns, scrim capcoats, composites with tuft-lock components as well as incorporation into the carpet yarns, to provide an anti-static property to the finished carpet.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: July 12, 1988
    Assignee: The Dow Chemical Company
    Inventors: Francis P. McCullough, David M. Hall
  • Patent number: 4643931
    Abstract: An electroconductive tow or yarn, made from continuous filaments or staple fibers, respectively, prepared from stabilized petroleum pitch, coal tar pitch or polyacrylonitrile is preferably knit and heat treated to a carbonizing temperature and thereafter deknitted, chopped into appropriate length and blended with the standard carpet fibers or yarn at any one of several steps in the yarn making process to produce a yarn having static dissipation properties.
    Type: Grant
    Filed: September 9, 1985
    Date of Patent: February 17, 1987
    Assignee: The Dow Chemical Company
    Inventors: Francis P. McCullough, Jr., David M. Hall
  • Patent number: 4146660
    Abstract: Insulation comprising a multiplicity of small chips of corrugated cardboard. The chips have varying external configurations and varying orientation of the long axis of the flute(s) with a side of the chip. The chips may be utilized as loose, bagged or block insulation.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: March 27, 1979
    Inventors: David M. Hall, Robert F. Russell