Patents by Inventor David A. Hunt

David A. Hunt 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).

  • Amidrazones and their use as insecticidal and acaricidal agents
    Patent number: 5585389
    Abstract: There are provided substituted acid amide, arylhydrazone compounds (amidrazones) of formula I ##STR1## the use thereof for the control of insect and acarid pests and methods and compositions for the protection of crops from the damage and loss caused by said pests.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: December 17, 1996
    Assignee: American Cyanamid Company
    Inventors: Joseph A. Furch, David G. Kuhn, David A. Hunt
  • N-aryl- and N-heteroarylhydrazones of substituted thioacids and the s-oxides thereof as insecticidal and acaricidal agents
    Patent number: 5556885
    Abstract: There are provided N-arylthiohydrazone derivatives of formula I ##STR1## the use thereof for the control of insect and acarid pests and methods and compositions for the protection of crops from the damage and loss caused by said pests.
    Type: Grant
    Filed: October 27, 1994
    Date of Patent: September 17, 1996
    Assignee: American Cyanamid Company
    Inventors: Susan Trotto, Joseph A. Furch, III, David G. Kuhn, David A. Hunt
  • Amidrazones and their use as insecticidal and acaricidal agents
    Patent number: 5420165
    Abstract: There are provided substituted acid amide, arylhydrazone compounds (amidrazones) of formula I ##STR1## the use thereof for the control of insect and acarid pests and methods and compositions for the protection of crops from the damage and loss caused by said pests.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: May 30, 1995
    Assignee: American Cyanamid Company
    Inventors: Joseph A. Furch, David G. Kuhn, David A. Hunt
  • Herbicidally active aryloxy saturated 5-membered benzo fused hetero-cyclic compounds
    Patent number: 4911754
    Abstract: This invention relates to aryloxy dihydrobenzofuran, oxoindole or benzofuranone derivatives having herbicidal activity and to the use of such compounds to control the growth of noxious plants, i.e., weeds.
    Type: Grant
    Filed: July 16, 1987
    Date of Patent: March 27, 1990
    Assignee: American Cyanamid Company
    Inventors: David A. Hunt, James A. Schwindeman
  • Photochromic compound and articles containing the same
    Patent number: 4792224
    Abstract: Described are photochromic spiro (oxazolidine) substituted benzoxazine photochromic compounds and their use in plastic hosts to impart a photochromic response thereto. More particularly, there are described spiro (oxazolidine) pyrido benzoxazine and spiro (oxazolidine) naphthoxazine compounds and their use in substrates such as polymerizates of allyl digylcol carbonate.
    Type: Grant
    Filed: May 14, 1987
    Date of Patent: December 20, 1988
    Assignee: PPG Industries, Inc.
    Inventors: Patricia L. Kwiatkowski, David A. Hunt
  • Herbicidally active aryloxy optionally oxo-substituted indane or tetralin derivatives
    Patent number: 4790870
    Abstract: This invention relates to aryloxy optionally oxo-substituted indane or tetralin derivatives having herbicidal activity and to the use of such compounds to control the growth of noxious plants, i.e., weeds.
    Type: Grant
    Filed: May 1, 1987
    Date of Patent: December 13, 1988
    Assignee: PPG Industries, Inc.
    Inventors: David A. Hunt, James A. Schwindeman
  • Herbicidally active imidazopyrrolo-pyridine (or benzene) derivatives
    Patent number: 4717414
    Abstract: The invention relates to imidazopyrrolo-pyridine (or benzene) derivatives having herbicidal activity, herbicidal compositions thereof and the use thereof to control plant growth.
    Type: Grant
    Filed: August 8, 1986
    Date of Patent: January 5, 1988
    Assignee: PPG Industries, Inc.
    Inventor: David A. Hunt
  • Process for the preparation of carbofuran
    Patent number: 4463184
    Abstract: A novel process is provided for the preparation of carbofuran and certain intermediate products. 1,2-Cyclohexanedione is alkylated with a beta-methallyl compound and the resulting product subjected to a Claisen rearrangement/aromatization to provide the carbofuran phenol. Reaction of the phenol with methyl isocyanate converts the phenol to the desired carbofuran.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: July 31, 1984
    Assignee: Union Carbide Corporation
    Inventor: David A. Hunt
  • Process for repairing concrete structures using pneumatically sprayable cement mortar compositions containing portland cement, mineral aggregate, a styrene-butadiene copolymer latex and water
    Patent number: 4057528
    Abstract: Process for repairing concrete compositions using cement mortar compositions which are capable of being pneumatically sprayed and which provide unexpectedly enhanced bonding capabilities and resistance to slump; said compositions comprising essentially a substantially non-air entraining portland cement, mineral aggregate, a styrene-butadiene copolymer latex present on a solids basis in an amount of from about 5 to about 25 percent by weight of cement, and water in an amount sufficient to provide a total water to cement ratio of from 0.22 to 0.26.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: November 8, 1977
    Assignee: The Dow Chemical Company
    Inventor: David A. Hunt