Patents by Inventor Wallace M. Craig, Jr.

Wallace M. Craig, Jr. 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).

  • Process for preparing bis (4-cyanatophenyl)-1,1-ethane
    Patent number: 5420342
    Abstract: Bis(4-cyanatophenyl)-1,1-ethane, a low viscosity liquid, which is useful in wet filament winding, resin transfer molding and pultrusion processes is made by reacting cyanogen chloride dissolved in methylisobutylketone with a methylisobutylketone solution of bis(4-hydroxylphenyl)-1,1-ethane and a tertiary amine.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: May 30, 1995
    Assignee: Ciba-Geigy Corporation
    Inventor: Wallace M. Craig, Jr.
  • Process for preparing bis (4-cyanatophenyl)-1,1-ethane
    Patent number: 5284968
    Abstract: Bis(4-cyanatophenyl)-1,1-ethane, a low viscosity liquid, which is useful in wet filament winding, resin transfer molding and pultrusion processes is made by reacting cyanogen chloride dissolved in methylisobutylketone with a methylisobutylketone solution of bis(4-hydroxylphenyl)-1,1-ethane and a tertiary amine.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: February 8, 1994
    Assignee: Ciba-Geigy Corporation
    Inventor: Wallace M. Craig, Jr.
  • Bis(4-cyanatophenyl)-1,1-ethane
    Patent number: 5162574
    Abstract: Bis(4-cyanatophenyl)-1,1-ethane, a low viscosity liquid, is useful in wet filament winding, resin transfer molding and pultrusion processes.
    Type: Grant
    Filed: September 13, 1990
    Date of Patent: November 10, 1992
    Assignee: Hi-Tek Polymers, Inc.
    Inventor: Wallace M. Craig, Jr.
  • Low viscosity noncrystalline dicyanate ester blends with prepolymers of dicyanate esters
    Patent number: 4839442
    Abstract: Low viscosity dicyanate esters are made from bisphenols wherein the bridging member between the phenyl groups is unsymmetrical. These dicyanate esters are blended with prepolymers of dicyanate esters to form low viscosity non-crystallizing resins useful in preparing composites.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: June 13, 1989
    Assignee: Hi-Tek Polymers, Inc.
    Inventor: Wallace M. Craig, Jr.