Patents by Inventor Barry V. Gemert

Barry V. 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).

  • Substituted naphthopyrans
    Patent number: 5573712
    Abstract: Described are novel reversible photochromic naphthopyran compounds, examples of which are compounds having certain substituents at the number 5 and 6 carbon atoms of the naphtho portion of the naphthopyran and at the 2-position of the pyran ring. Certain substituents may also be present at the number 7, 8, 9 or 10 carbon atoms of the naphtho portion of the naphthopyran. 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(indoline) type compounds, are also described.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: November 12, 1996
    Assignee: Transitions Optical, Inc.
    Inventors: Anil Kumar, Barry V. Gemert, David B. Knowles
  • Photochromic tetraphenyl naphthodipyrans
    Patent number: 5464567
    Abstract: Described are novel reversible photochromic naphthopyran compounds which have two phenyl moieties adjacent to each oxygen of each pyran ring. The substituents on each pair of phenyl moieties mirror one another when the phenyl groups are substituted. The naphthodipyrans are prepared from .beta.,.beta.-dihydroxynaphthalene compounds.
    Type: Grant
    Filed: April 8, 1994
    Date of Patent: November 7, 1995
    Assignee: Transitions Optical, Inc.
    Inventors: David B. Knowles, Barry V. Gemert
  • Photochromic naphthopyran compounds
    Patent number: 5066818
    Abstract: Described are novel reversible photochromic naphthopyran compounds having at least one ortho substituted phenyl group at the 3-position of the pyran ring. 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: March 7, 1990
    Date of Patent: November 19, 1991
    Assignee: PPG Industries, Inc.
    Inventors: Barry V. Gemert, Maria P. Bergomi
  • Sulfamoyl urea derivatives
    Patent number: 4696695
    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: August 4, 1986
    Date of Patent: September 29, 1987
    Assignee: PPG Industries, Inc.
    Inventor: Barry V. Gemert
  • Sulfamoyl urea derivatives
    Patent number: 4602939
    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: September 16, 1985
    Date of Patent: July 29, 1986
    Assignee: PPG Industries, Inc.
    Inventor: Barry V. Gemert