Patents by Inventor John W. Hull, Jr.

John W. Hull, Jr. 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).

  • Process for brominating butadiene/vinyl aromatic copolymers
    Publication number: 20090292079
    Abstract: Butadiene copolymers are brominated in solution using bromine as the brominating agent. The bromination is conducted in the presence of an excess of an aliphatic alcohol, relative to the amount of bromine that is used. The bromination proceeds rapidly at mild conditions, and is selective in that only aliphatic carbon-carbon double bonds are brominated, and unwanted bromination at tertiary carbon atoms is largely or completely avoided. The resulting brominated polymers are characterized in having very good thermal stability.
    Type: Application
    Filed: August 14, 2007
    Publication date: November 26, 2009
    Inventors: Daniel J. Murray, David B. Gorman, John W. Hull, JR., William J. Kruper, JR., Ted A. Morgan, Bruce A. King, Ronald B. Leng
  • Process for preparing 3-(substituted phenyl)-5-thienyl or furyl)-1,2,4-triazoles and novel intermediates utilized therein
    Patent number: 6329528
    Abstract: New synthetic procedures for preparing insecticidal 3-(substituted phenyl)-5-(thienyl or furyl)-1,2,4-triazoles utilizing thioimidate intermediate.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: December 11, 2001
    Assignee: Dow AgroSciences LLC
    Inventors: Mary L. Ash, Mark W. Zettler, Norman R. Pearson, Duane R. Romer, John W. Hull, Jr., David E. Podhorez
  • One pot synthesis of 1,2,4-triazoles
    Patent number: 6096898
    Abstract: One pot synthesis of 1,2,4-triazoles uses thioimidate intermediate and 1,2-dichloroethane solvent.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: August 1, 2000
    Assignee: Dow AgroSciences LLC
    Inventors: David E. Podhorez, John W. Hull, Jr., Christine H. Brady
  • One-step preparation of 4,6-dinitroresorcinol from resorcinol
    Patent number: 5371303
    Abstract: 4,6-Dinitroresorcinol is prepared by reacting resorcinol with concentrated nitric acid that is substantially free of suboxides of nitric acid. It has been found that greater than 60 percent yields of the desired product can be obtained when the concentration of aqueous nitric acid used is between about 80 and about 93 weight percent, and the concentration of suboxides is less than about 2 weight percent based on the weight of nitric acid.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: December 6, 1994
    Assignee: The Dow Chemical Company
    Inventors: William J. Kruper, Zenon Lysenko, John W. Hull, Jr., George J. Frycek
  • Process for the preparation of 2-alkyl-5-hydroxypyrimidines from 1,3-diamino-2-propanol and an alkanecarboxylic acid
    Patent number: 5189166
    Abstract: A process for the efficient manufacture of 2-alkyl-5-hydroxypyrimidines from relatively inexpensive raw materials is provided.The vapor phase condensation/cyclization of 1,3-diamino-2-propanol and an alkanecarboxylic acid produces an equilibrium mixture of 2-alkyl-5-hydroxytetrahydropyrimidine and 2-alkyl-5-(aminomethyl)oxazoline. After separation from the oxazoline, the tetrahydropyrimidine can be dehydrogenated under mild neutral conditions with manganese dioxide to produce 2-alkyl-5-hydroxypyrimidines.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: February 23, 1993
    Assignee: DowElanco
    Inventor: John W. Hull, Jr.
  • Regeneration and extension of lifetime of dehydrogenation catalysts used in the preparation of 2-alkylpyrimidines
    Patent number: 5180700
    Abstract: The useful life of the palladium dehydrogenation catalyst used in the preparation of 2-alkylpyrimidines from 1,3-diaminopropane and an appropriate alkanecarboxylic acid in a continuous vapor phase process is substantially increased by employing a stoichiometric excess of the carboxylic acid and by using catalyst pellets of less than 3-4 mm diameters. Additionally, the dehydrogenation catalyst can be regenerated in situ by controlled air oxidation below 350.degree. C.
    Type: Grant
    Filed: May 13, 1991
    Date of Patent: January 19, 1993
    Assignee: DowElanco
    Inventors: Eva F. Tai, John W. Hull, Jr., Kenneth E. First