Patents by Inventor John Krenzer

John Krenzer 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).

  • N-alpha-chlordacetyl-N-(1,3-dioxan-2-ylmethyl)-2,6-dimethylaniline
    Patent number: 3946043
    Abstract: This invention discloses the compound N-.alpha.-chloroacetyl-N-(1,3-dioxan-2-ylmethyl)-2,6-dimethylaniline and its utility as a herbicide.
    Type: Grant
    Filed: July 26, 1974
    Date of Patent: March 23, 1976
    Assignee: Velsicol Chemical Corporation
    Inventors: Sidney B. Richter, John Krenzer
  • N-alpha-chloroacetyl-n-(1,3-dioxolan-2-ylmethyl)-2-ethyl-6-methylaniline
    Patent number: 3946044
    Abstract: This invention discloses the compound N-.alpha.-chloroacetyl-N-(1,3-dioxolan-2-ylmethyl)-2-ethyl-6-methylaniline and its utility as a herbicide.
    Type: Grant
    Filed: August 1, 1974
    Date of Patent: March 23, 1976
    Assignee: Velsicol Chemical Corporation
    Inventors: Sidney B. Richter, John Krenzer
  • Dioxolane substituted anilids
    Patent number: 3946045
    Abstract: This invention discloses new compounds of the formula ##SPC1##Wherein Y is selected from the group consisting of hydrogen, lower alkyl and halogen; R.sup.1 is selected from the group consisting of hydrogen, lower alkyl and lower alkoxy; R.sup.2 is lower alkyl; R.sup.3 and R.sup.4 are independently selected from the group consisting of hydrogen and lower alkyl; X is halogen; and n is the integer 1 or 2. The compounds of the above description are useful as herbicides.
    Type: Grant
    Filed: November 13, 1974
    Date of Patent: March 23, 1976
    Assignee: Velsicol Chemical Corporation
    Inventors: Sidney B. Richter, John Krenzer
  • Method of increasing the yield of plants having storage organs by treatment with thiadiazolylimidazolines
    Patent number: 3944409
    Abstract: This invention discloses a method of increasing the yield of plant food contained in plant storage organs which comprises contacting the plants having storage organs with from about 0.05 to about 4.0 pounds per acre of a compound of the formula ##EQU1## wherein R.sup.1 is selected from the group consisting of alkyl, alkenyl, chloroalkyl, trifluoromethyl, alkoxy, alkylthio, alkylsulfonyl, alkylsulfinyl and cycloalkyl of from 3 to 7 carbon atoms optionally substituted with from 1 to 2 substituents selected from the group consisting of alkyl, alkoxy and halogen; and R.sup.2 is alkyl.
    Type: Grant
    Filed: December 19, 1974
    Date of Patent: March 16, 1976
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • Substituted oxadiazolidine dione herbicides
    Patent number: 3944410
    Abstract: New compounds of the formula ##SPC1##Wherein X is halogen; Y is selected from the group consisting of alkyl, alkenyl, haloalkyl, halogen, alkoxy, nitro, alkylthio, alkylsulfoxide and alkylsulfone; and n is an integer from 0 to 4, provided a maximum of two Y's are selected from the group consisting of nitro when n is greater than two. A herbicidal composition comprising an inert carrier and, in a quantity toxic to weeds, a compound of the above description. A method of controlling weeds which comprises contacting said weeds with a herbicidal composition described.
    Type: Grant
    Filed: October 4, 1974
    Date of Patent: March 16, 1976
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • Dioxolane substituted .alpha.-haloanilides as herbicides
    Patent number: 3942972
    Abstract: This invention discloses new compounds of the formula ##EQU1## wherein Y is selected from the group consisting of hydrogen, lower alkyl and halogen; R.sup.1 is selected from the group consisting of hydrogen, lower alkyl and lower alkoxy; R.sup.2 is lower alkyl; R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are independently selected from the group consisting of hydrogen and lower alkyl; X is halogen; m is an integer from 0 to 2; Z.sup.1 and Z.sup.2 are independently selected from the group consisting of oxygen and sulfur; and n is an integer from 1 to 2. The compounds of the above description are useful as herbicides.
    Type: Grant
    Filed: June 3, 1974
    Date of Patent: March 9, 1976
    Assignee: Velsicol Chemical Corporation
    Inventors: Sidney B. Richter, John Krenzer
  • Dioxane substituted-.alpha.-haloanilides as herbicides
    Patent number: 3940259
    Abstract: This invention discloses new compounds of the formula ##EQU1## wherein Y is selected from the group consisting of hydrogen, lower alkyl and halogen; R.sup.1 is selected from the group consisting of hydrogen, lower alkyl and lower alkoxy; R.sup.2 is lower alkyl; R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are independently selected from the group consisting of hydrogen and lower alkyl; X is halogen; m is an integer from 0 to 2; Z.sup.1 and Z.sup.2 are independently selected from the group consisting of oxygen and sulfur; and n is an integer from 1 to 2. The compounds of the above description are useful as herbicides.
    Type: Grant
    Filed: June 3, 1974
    Date of Patent: February 24, 1976
    Assignee: Velsicol Chemical Corporation
    Inventors: Sidney B. Richter, John Krenzer
  • Thiadiazolylimidazolines
    Patent number: 3933839
    Abstract: This invention discloses compounds of the formula ##EQU1## wherein R.sup.1 is selected from the group consisting of alkyl, alkenyl, chloroalkyl, trifluoromethyl, alkoxy, alkylthio, alkylsulfonyl, alkylsulfinyl and cycloalkyl of from 3 to 7 carbon atoms optionally substituted with from 1 to 2 substituents selected from the group consisting of alkyl, alkoxy and halogen; and R.sup.2 is alkyl. Further disclosed are herbicidal compositions containing a compound of the above description.
    Type: Grant
    Filed: March 11, 1974
    Date of Patent: January 20, 1976
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • 1-Thiadiazolyl-6-alkoxytetrahydropyrimidinones
    Patent number: 3932410
    Abstract: Disclosed are new compounds of the formula ##EQU1## wherein R.sup.1 is selected from the group consisting of alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, alkylsulfonyl and alkylsulfinyl; R.sup.2 is selected from the group consisting of alkyl, alkenyl, haloalkyl and ##EQU2## wherein R.sup.3 and R.sup.4 are each selected from the group consisting of hydrogen and alkyl; and R.sup.5 is alkyl. The subject compounds are useful as herbicides.
    Type: Grant
    Filed: November 1, 1974
    Date of Patent: January 13, 1976
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • 1-(5-Trifluoromethyl-1,3,4-thiadiazo l-2-yl)-3-methyl-5-hydroxy-1,3-imidazolidin-2-one
    Patent number: 3932438
    Abstract: This invention discloses the compound 1-(5-trifluoromethyl-1,3,4-thiadiazol-2-yl)-3-methyl-5-hydroxy-1,3-imidazo lidin-2-one and its use as a herbicide.
    Type: Grant
    Filed: February 11, 1974
    Date of Patent: January 13, 1976
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • 2-Alkyl-4-thiadiazolyl-1,2,4-triazolidin-3-ones
    Patent number: 3931209
    Abstract: This invention discloses compounds of the formula ##EQU1## wherein R.sup.1 is selected from the group consisting of alkyl, alkenyl, chloroalkyl, trifluoromethyl, alkoxy, alkylthio, alkylsulfonyl, alkylsulfinyl and cycloalkyl of from 3 to 7 carbon atoms optionally substituted with from 1 to 2 substituents selected from the group consisting of alkyl, alkoxy and halogen; and R.sup.2 is alkyl. Further disclosed are herbicidal compositions containing a compound of the above description.
    Type: Grant
    Filed: March 28, 1974
    Date of Patent: January 6, 1976
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer