Patents by Inventor Ronald F. Lovenguth

Ronald F. Lovenguth 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).

  • Tetrahalophthalate esters as flame retardants for polybutylene terephthalate resins (PBT)
    Patent number: 4954542
    Abstract: Tetrahalophthalate esters are disclosed herein as flame retardant processing aids for polybutylene terephthalate (PBT) resins.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: September 4, 1990
    Assignee: Pennwalt Corporation
    Inventors: Joseph M. Bohen, Ronald F. Lovenguth
  • Tetrahalophthalate esters as flame retardants for ABS (acrylonitrile-butadiene styrene terpolymer) resins
    Patent number: 4938894
    Abstract: Tetrahalophthalate esters are disclosed herein as flame retardant processing aids for ABS (acrylonitrile-butadienestyrene terpolymer) resins.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: July 3, 1990
    Assignee: Pennwalt Corporation
    Inventors: Joseph M. Bohen, Ronald F. Lovenguth
  • Tetrahalophthalate esters as flame retardants for polystyrene resins
    Patent number: 4923916
    Abstract: Tetrahalophthalate esters are disclosed herein as flame retardant processing aids for polystyrene resins.
    Type: Grant
    Filed: July 19, 1988
    Date of Patent: May 8, 1990
    Assignee: Pennwalt Corporation
    Inventors: Joseph M. Bohen, Ronald F. Lovenguth
  • Tetrahalophthalate esters as flame retardants for polycarbonate resins
    Patent number: 4912158
    Abstract: Tetrahalophthalate esters are disclosed herein as flame retardant processing aids for polycarbonate resins.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: March 27, 1990
    Assignee: Pennwalt Corporation
    Inventors: Joseph M. Bohen, Ronald F. Lovenguth
  • Tetrahalophthalate esters as flame retardants for polyphenylene ether resins
    Patent number: 4764550
    Abstract: Tetrahalophthalate esters are disclosed herein as flame retardant processing aids for polyphenylene ether resins.
    Type: Grant
    Filed: August 15, 1986
    Date of Patent: August 16, 1988
    Assignee: Pennwalt Corporation
    Inventors: Ronald F. Lovenguth, Joseph M. Bohen
  • Tetrahalophthalate esters as flame retardants for polystyrene resins
    Patent number: 4762861
    Abstract: Tetrahalophthalate esters are disclosed herein as flame retardant processing aids for polystyrene resins.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: August 9, 1988
    Assignee: Pennwalt Corporation
    Inventors: Joseph M. Bohen, Ronald F. Lovenguth
  • Flame retardant polyphenylene ether-styrene thermoplastic resin compositions
    Patent number: 4446265
    Abstract: A flame retardant polyphenylene ether-styrene resin composition having a UL-94 rating of V-1 or better, a heat distortion temperature greater than 92.degree. C. and a melt viscosity at 260.degree. C. of less than 200 pascal second is obtained by incorporating with said polyphenylene ether-styrene resin composition from about 4 to about 7 parts per hundred of a triaryl phosphate ester and from about 0.5 to about 3 parts per hundred of a 3-hydroxyalkyl phosphine oxide having the formula: ##STR1## wherein R.sub.1 may be the same or a different radical selected from the group consisting of hydrogen and the methyl radicals, R.sub.2 is a radical of 4 to 8 carbon atoms and n is either zero or one.
    Type: Grant
    Filed: February 1, 1982
    Date of Patent: May 1, 1984
    Assignee: FMC Corporation
    Inventors: Diza P. Braksmayer, Ronald F. Lovenguth