Patents by Inventor Barry Van Gemert

Barry Van Gemert 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).

  • Photochromic naphthopyrans
    Patent number: 5340857
    Abstract: Described are novel reversible photochromic naphthopyran compounds substituted on the naphthyl portion at the carbon atom juxtaposed to the oxygen of the pyran ring with, for example, an acetoxy group. Also described are organic host materials that contain or that are coated with such compounds. Articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., spiro(indolino)-oxazine type compounds, are also described.
    Type: Grant
    Filed: July 14, 1993
    Date of Patent: August 23, 1994
    Assignee: PPG Industries, Inc.
    Inventor: Barry Van Gemert
  • Temperature stable and sunlight protected photochromic articles
    Patent number: 5330686
    Abstract: Described is a photochromic composition which is a polymerizate of acrylate monomer(s), a crosslinking amount of anhydrous acrylic anhydride and/or anhydrous methacrylate anhydride and a photochromic amount of pyrido benzoxazine. Depending on the amount of crosslinking agents and the other components selected to form the polymerizate, the polymerizate will exhibit improved temperature stability with regard to photocolorability and/or prevention of activation in sunlight.
    Type: Grant
    Filed: August 19, 1992
    Date of Patent: July 19, 1994
    Assignee: PPG Industries, Inc.
    Inventors: Robert A. Smith, Barry Van Gemert
  • Photochromic naphthopyrans
    Patent number: 5244602
    Abstract: Described are novel reversible photochromic naphthopyran compounds substituted on the naphthyl portion at the carbon atom juxtaposed to the oxygen of the pyran ring with, for example, an acetoxy group. Also described are organic host materials that contain or that are coated with such compounds. Articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., spiro(indolino)-oxazine type compounds, are also described.
    Type: Grant
    Filed: December 3, 1990
    Date of Patent: September 14, 1993
    Assignee: PPG Industries, Inc.
    Inventor: Barry Van Gemert
  • Aquatic herbicidal methods
    Patent number: 4911749
    Abstract: This invention concerns the use of certain 3-[5- or 3-substituted-1,2,4-oxadiazol-3- or -5-yl]-1-substituted -4-substituted-5-substituted or unsubstituted-2-imidazolidinones to control growth of terrestrial or aquatic plants.
    Type: Grant
    Filed: June 20, 1989
    Date of Patent: March 27, 1990
    Assignee: American Cyanamid Company
    Inventors: Jerome M. Lavanish, Barry Van Gemert
  • Terrestrial and aquatic herbicidal methods
    Patent number: 4857099
    Abstract: This invention concerns the use of certain 3-[5- or 3-substituted-1,2,4-oxadiazol-3- or -5-yl]-1-substituted-4-substituted-5-substituted or unsubstituted-2-imidazolidinones to control growth of terrestrial or aquatic plants.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: August 15, 1989
    Assignee: American Cyanamid Company
    Inventors: Jerome M. Lavanish, Barry Van Gemert
  • Sulfamoyl urea derivatives
    Patent number: 4741762
    Abstract: The invention relates to herbicidally active sulfamoyl urea derivatives, including herbicidal formulations and uses thereof to control the growth of noxious plants, i.e., weeds.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: May 3, 1988
    Assignee: PPG Industries, Inc.
    Inventor: Barry Van Gemert
  • Sulfamoyl urea derivatives
    Patent number: 4666508
    Abstract: The invention relates to herbicidally active sulfamoyl urea derivatives, including herbicidal formulations and uses thereof to control the growth of noxious plants, i.e., weeds.
    Type: Grant
    Filed: June 25, 1985
    Date of Patent: May 19, 1987
    Assignee: PPG Industries, Inc.
    Inventor: Barry Van Gemert
  • Sulfamoyl urea derivatives
    Patent number: 4622065
    Abstract: The invention relates to herbicidally active sulfamoyl urea derivatives, including herbicidal formulations and uses thereof to control the growth of noxious plants, i.e., weeds.
    Type: Grant
    Filed: October 25, 1985
    Date of Patent: November 11, 1986
    Assignee: PPG Industries, Inc.
    Inventor: Barry Van Gemert
  • Herbicidally active 3-oxadiazolyl-2-imidazolidinones
    Patent number: 4612038
    Abstract: The invention relates to herbicidally active 3-oxadiazolyl-2-imidazolidinone derivatives, including herbicidal formulation and the use thereof to control the growth of noxious plants, i.e., weeds.
    Type: Grant
    Filed: June 24, 1985
    Date of Patent: September 16, 1986
    Assignee: PPG Industries, Inc.
    Inventors: Barry Van Gemert, Jerome M. Lavanish, James A. Schwindeman
  • Sulfamoyl urea derivatives
    Patent number: 4592776
    Abstract: The invention relates to herbicidally active sulfamoyl urea derivatives, including herbicidal formulations and uses thereof to control the growth of noxious plants, i.e., weeds.
    Type: Grant
    Filed: February 4, 1985
    Date of Patent: June 3, 1986
    Assignee: PPG Industries, Inc.
    Inventor: Barry Van Gemert
  • Sulfamoyl urea derivatives
    Patent number: 4559081
    Abstract: The invention relates to herbicidally active sulfamoyl urea derivatives, including herbicidal formulations and uses thereof to control the growth of noxious plants, i.e., weeds.
    Type: Grant
    Filed: December 3, 1984
    Date of Patent: December 17, 1985
    Assignee: PPG Industries, Inc.
    Inventor: Barry Van Gemert
  • Herbicidally active oxadiazole ureas
    Patent number: 4449998
    Abstract: This invention concerns certain 3-(5-substituted-1,2,4-oxadiazol-3-yl)-1,1-substituted ureas having herbicidal activity, and their use to control weeds.
    Type: Grant
    Filed: May 20, 1982
    Date of Patent: May 22, 1984
    Assignee: PPG Industries, Inc.
    Inventors: Jerome M. Lavanish, Barry Van Gemert
  • 3-[5- Or 3-substituted-1,2,4-oxadiazol-3- or -5-yl]-1-substituted-4-substituted-5-substituted or unsubstituted-2-imidazolidinones
    Patent number: 4426527
    Abstract: This invention concerns certain 3-[5- or 3-substituted-1,2,4-oxadiazol-3- or -5-yl]-1-substituted-4-substituted-5-substituted or unsubstituted-2-imidazolidinones having herbicidal activity and the use thereof to control weed growth.
    Type: Grant
    Filed: February 12, 1982
    Date of Patent: January 17, 1984
    Assignee: PPG Industries, Inc.
    Inventors: Jerome M. Lavanish, Barry Van Gemert
  • Substituted benzoic or phenylacetic acid esters having plant growth regulating properties
    Patent number: 4388473
    Abstract: This invention relates to substituted benzoic acid or phenylacetic acid ester compounds exhibiting meristematic activity and to the use of such compounds in regulating plant growth.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: June 14, 1983
    Assignee: PPG Industries, Inc.
    Inventors: Sidney B. Richter, Barry Van Gemert