Patents by Inventor Donald G. Stoffey

Donald G. Stoffey 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).

  • Method for rigid enclosures and molded items
    Patent number: 4085180
    Abstract: An improved method for providing lightweight and strong rigid enclosures and molded items formed by enclosing, wrapping or filling a mold of said items or articles with a dry peroxide catalyst-impregnated fabric or solid substrate filler material and applying thereto or mixing therewith an activated thermosetting vinyl-type resin and allowing said fabric or filler material to harden about the article or within the mold of said article. Said resin system and molding procedure is safe and of low toxicity.
    Type: Grant
    Filed: December 16, 1975
    Date of Patent: April 18, 1978
    Inventor: Donald G. Stoffey
  • Process for preparing esters
    Patent number: 4068082
    Abstract: Esters are prepared by reaction of acyl halides and alcohols or hydroxyalkyl esters and acid halides in the presence of a tertiary amine and polar aprotonic solvents. Bis(2-methacrylatoethyl) phthalate is prepared by the reaction of phthaloyl chloride with 2-hydroxyethyl methacrylate in pyridine and acetone. Bis-phenol-A-bis(2-methacrylatoethyl)ether is prepared from 2,2-bis[4-(2-hydroxyethoxy)phenyl]-propane and methacryl chloride in acetone.
    Type: Grant
    Filed: September 19, 1973
    Date of Patent: January 10, 1978
    Assignee: Lee Pharmaceuticals
    Inventors: Donald G. Stoffey, Jan Alexander Orlowski
  • System and method for rigid enclosures
    Patent number: 3955566
    Abstract: An improved system and method for producing lightweight and strong rigid enclosures formed by enclosing or wrapping the article in a dry peroxide catalyst-impregnated fabric and applying thereto an activated thermosetting vinyl type resin. The disclosed enclosure is especially useful as a porous surgical dressing or as an orthopedic support.
    Type: Grant
    Filed: January 19, 1973
    Date of Patent: May 11, 1976
    Inventor: Donald G. Stoffey