Patents by Inventor Howard L. Plant

Howard L. Plant 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).

  • Antiretroviral compounds and compositions
    Patent number: 6498254
    Abstract: Certain pyridine and quinoline derivatives' which inhibit replication of the retroviruses HIV-1, HIV-2 and human cytomegalovirus (HCMV) are provided. Pharmaceutical compositions useful in methods of treating or inhibiting certain retrovirus infections are described.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: December 24, 2002
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Arthur D. Brewer, Stephen E. Cantor, Mark A. Dekeyser, Arthur M. P. Doweyko, John W. Harris, John A. Lacadie, James B. Pierce, Howard L. Plant, William A. Harrison
  • Method of stimulating the growth of plants employing substituted oxadiazoles
    Patent number: 4919703
    Abstract: A method of stimulating the growth of desirable plants comprising applying a plant growth stimulatory amount of certain 2-methylhalide or 2-methylthiophosphate substituted 1,3,4-oxadiazole compounds.
    Type: Grant
    Filed: August 19, 1988
    Date of Patent: April 24, 1990
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Allen R. Blem, Howard L. Plant, Richard R. Regis
  • Certain 2-(pyridyl or thienyl)-1,3,4-oxadiazole-5-methylene-thio-phosphates, thio analogues thereof compositions containing same and pesticidal use
    Patent number: 4654330
    Abstract: A compound of the formula ##STR1## wherein R is allyl, halocyclopropyl, C.sub.3 -C.sub.5 alkoxycarbonylmethyl, C.sub.7 -C.sub.9 aralkyl, styryl, phenyl, naphthyl, furanyl, pyridyl, thienyl, phenyl substituted with halogen, C.sub.1 -C.sub.4 alkyl, trihalomethyl, C.sub.1 -C.sub.4 alkoxy, trihalomethoxy, trihalomethylthio, C.sub.1 -C.sub.4 alkylthio, phenyl, phenoxy, cyano or nitro or C.sub.7 -C.sub.9 aralkyl substituted with halogen, C.sub.1 -C.sub.4 alkyl, trihalomethyl, C.sub.1 -C.sub.4 alkoxy, trihalomethoxy, trihalomethylthio, C.sub.1 -C.sub.4 alkylthio, phenyl, phenoxy, cyano or nitro; R.sup.1 is hydrogen, C.sub.1 -C.sub.3 alkyl, C.sub.7 -C.sub.9 aralkyl, phenyl, C.sub.7 -C.sub.9 aralkyl substituted with halogen, C.sub.1 -C.sub.4 alkyl, trihalomethyl, C.sub.1 -C.sub.4 alkoxy, trihalomethoxy, trihalomethylthio, C.sub.1 -C.sub.4 alkylthio, phenyl, phenoxy, cyano or nitro or phenyl substituted with halogen, C.sub.1 -C.sub.4 alkyl, trihalomethyl, C.sub.1 -C.sub.4 alkoxy, trihalomethoxy, trihalomethylthio, C.
    Type: Grant
    Filed: March 23, 1984
    Date of Patent: March 31, 1987
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Howard L. Plant, Richard R. Regis, Richard C. Moore
  • Substituted pyridine 1-oxide herbicides
    Patent number: 4394155
    Abstract: Compounds of the following formula are effective as premergence herbicides: ##STR1## wherein R and R.sup.1 may be the same or different and are C.sub.1 to C.sub.4 alkyl, C.sub.1 to C.sub.4 alkoxy, phenyl or halogen, provided that R or R.sup.1 is not halogen if attached in the 3- position of the pyridine ring, and R or R.sup.1 may further be hydrogen provided that one of them is one of the recited moieties other than hydrogen; R.sup.2 is hydrogen, halogen, methyl or ethyl; R.sup.3 is phenyl or phenyl substituted with halogen, C.sub.1 to C.sub.4 alkyl, C.sub.1 to C.sub.4 alkoxy, or nitro; and n is 1 or 2.
    Type: Grant
    Filed: February 5, 1981
    Date of Patent: July 19, 1983
    Assignees: Uniroyal, Inc., Uniroyal Ltd.
    Inventors: Howard L. Plant, Steven E. Cantor, Arthur M. Doweyko, Mark A. Dekeyser, Allyn R. Bell
  • Oxidation of alpha-alkylated, benzyl-substituted 2-thiopyridine 1-oxides
    Patent number: 4294970
    Abstract: A method of oxidizing alpha-alkylated, benzyl-substituted 2-thiopyridine 1-oxides by admixing the compound to be oxidized, a solvent for said compound, acetonitrile, hydrogen peroxide and a base.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: October 13, 1981
    Assignee: Uniroyal, Inc.
    Inventors: Howard L. Plant, Glenn S. Peterson
  • Thio pyridine N-oxides and regulation of the natural growth and development of plants therewith
    Patent number: 4120692
    Abstract: 2-Thio, 2-sulfinyl and 2-sulfonyl pyridine N-oxides of the formula ##STR1## are useful for regulating the natural growth or development of plants. E.g., the compound wherein n = 1, R.sub.1 = methyl and R.sub.2 = 2,3,4-trimethylphenyl retards cotton and increases root growth of turf.
    Type: Grant
    Filed: July 20, 1977
    Date of Patent: October 17, 1978
    Assignee: Uniroyal, Inc.
    Inventors: Howard L. Plant, John W. Zukel, Ronald B. Ames
  • Regulation of the natural growth or development of plants with 2-sulfinyl or 2-sulfonyl pyridine N-oxide compounds
    Patent number: 4050921
    Abstract: 2-Thio, 2-sulfinyl and 2-sulfonyl pyridine N-oxides of the formula ##STR1## ARE USEFUL FOR REGULATING THE NATURAL GROWTH OR DEVELOPMENT OF PLANTS. E.g., the compound wherein n = 1, R.sub.1 = methyl and R.sub.2 = 2,3,4-trimethylphenyl retards cotton and increases root growth of turf.
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: September 27, 1977
    Assignee: Uniroyal Inc.
    Inventors: Howard L. Plant, John W. Zukel, Ronald B. Ames
  • Herbicidal method using 2-sulfinyl or 2-sulfonyl pyridine N-oxide derivatives
    Patent number: 4019893
    Abstract: Preemergence or postemergence control of weeds is effected by applying certain 2-sulfinyl or 2-sulfonyl pyridine N-oxide derivatives, e.g., 2-(4-chlorophenylmethylsulfonyl)pyridine N-oxide.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: April 26, 1977
    Assignee: Uniroyal Inc.
    Inventors: Howard L. Plant, Allyn Roy Bell
  • Herbicidal 2-sulfinyl and 2-sulfonyl pyridine N-oxide derivatives
    Patent number: 3960542
    Abstract: Certain 2-sulfinyl and 2-sulfonyl pyridine N-oxide derivatives, e.g., 2-(2-chlorophenylmethylsulfonyl)pyridine N-oxide, useful in preemergence or postemergence control of weeds.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: June 1, 1976
    Assignee: Uniroyal Inc.
    Inventors: Howard L. Plant, Allyn R. Bell