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).

  • 2-(2,5-difluorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5 diones
    Patent number: 4758263
    Abstract: Disclosed are herbicides of the formula: ##STR1## wherein R is H or halo of atomic weight of from 18 to 80.
    Type: Grant
    Filed: October 27, 1986
    Date of Patent: July 19, 1988
    Assignee: Sandoz Ltd.
    Inventors: John Krenzer, Leonard J. Stach
  • Chemical agents
    Patent number: 4677204
    Abstract: 1. A chemical toxic agent selected from the group consisting of: ##STR1## where n is an integer from 3 to 11 and X represents one equivalent of an ion.
    Type: Grant
    Filed: December 7, 1965
    Date of Patent: June 30, 1987
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Harold Z. Sommer, John Krenzer, Omer O. Owens, Jacob I. Miller
  • Aminosulfonylthiadiazolylureas
    Patent number: 4255182
    Abstract: Disclosed are compounds of the formula ##STR1## wherein R.sup.1 is alkyl, R.sup.2 is selected from the group consisting of hydrogen and alkyl; or R.sup.1 and R.sup.2 together with the nitrogen atom form a cyclic ring structure having 4 or 5 carbon atoms; m is the integer 0 or 1; when m is 1, R.sup.4 and R.sup.5 are each independently selected from the group consisting of hydrogen and alkyl or up to 3 carbon atoms; when m is 0, R.sup.4 is hydrogen and R.sup.5 is the same as defined above; R.sup.3, R.sup.6, R.sup.7, R.sup.8, R.sup.9 are each independently selected from the group consisting of hydrogen and alkyl; n is an integer from 0 to 2; and Z.sup.1 and Z.sup.2 are each independently selected from the group consisting of oxygen and sulfur. These compounds are useful as herbicides.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: March 10, 1981
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • Substituted oxadiazolidine-3,5-diones
    Patent number: 4190431
    Abstract: This invention is concerned with a method for destroying undesirable plant life which comprises applying to said plant life a herbicidally toxic amount of a herbicide containing a chemical compound of the formula ##STR1## wherein R is selected from the group consisting of alkyl having 1 to 3 carbon atoms and alkenyl having 2 to 3 carbon atoms; Z is selected from the group consisting of oxygen and sulfur; X is selected from the group consisting of halogen, lower alkyl, lower alkenyl, lower haloalkyl, lower alkoxy, nitro, amino, lower alkylamino, lower dialkylamino, lower acylamino, N-lower alkyl-N-lower acylamino, lower alkylthio, lower alkylsulfoxide, lower alkyl sulfone, cyano, thiocyano and--N.dbd.
    Type: Grant
    Filed: November 17, 1967
    Date of Patent: February 26, 1980
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • 1-Thiadiazolyl-5-acylimidazolidinones
    Patent number: 4167407
    Abstract: This invention discloses new compounds of the formula ##STR1## wherein R.sup.1 is selected from the group consisting of alkyl of up to 3 carbon atoms, cycloalkyl, alkenyl, chloroalkyl, bromoalkyl, alkoxy, alkylthio, alkylsulfonyl and alkylsulfinyl; R.sup.2 is selected from the group consisting of alkyl, alkenyl, haloalkyl and ##STR2## wherein R.sup.4 and R.sup.5 are each selected from the group consisting of hydrogen and alkyl; and R.sup.3 is selected from the group consisting of alkyl, alkenyl, haloalkyl, alkynyl, alkoxyalkyl, cycloalkyl and ##STR3## WHEREIN X is selected from the group consisting of alkyl, alkoxy, halogen, haloalkyl, alkylthio, nitro and cyano; n is an integer from 0 to 3; and m is the integer 0 or 1. Further disclosed is the herbicidal utility of the foregoing compounds.
    Type: Grant
    Filed: April 25, 1975
    Date of Patent: September 11, 1979
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • 1-Thiazolyl-5-acyloxyimidazolidinones
    Patent number: 4118390
    Abstract: This invention discloses new compounds of the formula ##STR1## wherein X is selected from the group consisting of halogen and alkylsulfonyl; R.sup.1 is selected from the group consisting of alkyl, alkenyl, haloalkyl and alkynyl; and R.sup.2 is selected from the group consisting of alkyl, alkenyl, haloalkyl, alkynyl, alkoxyalkyl, cycloalkyl and ##STR2## WHEREIN P IS AN INTEGER FROM 0 TO 2; Y is selected from the group consisting of alkyl, alkenyl, halogen, haloalkyl, alkoxy, alkylthio, nitro and cyano; and m is an integer from 0 to 3.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: October 3, 1978
    Assignee: Velsicol Chemical Company
    Inventors: Chin Ching Wu, John Krenzer
  • 1-Thiazolyl-5-hydroxyimidazolidinones
    Patent number: 4116969
    Abstract: This invention discloses new compounds of the formula ##STR1## wherein X is halogen; and R.sup.1 is selected from the group consisting of alkyl, alkenyl, haloalkyl and ##STR2## wherein R.sup.2 and R.sup.3 are each selected from the group consisting of hydrogen and alkyl.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: September 26, 1978
    Assignee: Velsicol Chemical Company
    Inventors: Chin Ching Wu, John Krenzer
  • Thiadiazolylimidazolidinone esters of tetrahydrofuryl substituted acids
    Patent number: 4111949
    Abstract: This invention discloses new compounds of the formula ##STR1## WHEREIN R.sup.1 is selected from the group consisting of alkyl, cycloalkyl, alkenyl, haloalkyl, alkoxy, alkylthio, alkylsulfonyl and alkylsulfinyl; R.sup.2 is selected from the group consisting of alkyl, alkenyl, haloalkyl and ##STR2## wherein R.sup.4 and R.sup.5 are each selected from the group consisting of hydrogen and alkyl; p is an integer from 0 to 3; R.sup.3 is selected from the group consisting of alkyl and halogen; and q is an integer from 0 to 2. Further disclosed is the herbicidial utility of the foregoing compounds.
    Type: Grant
    Filed: March 25, 1976
    Date of Patent: September 5, 1978
    Assignee: Velsicol Chemical Company
    Inventor: John Krenzer
  • Thiazolylimidazolidinone esters of furyl and thienyl substituted acids
    Patent number: 4097485
    Abstract: This invention discloses new compounds of the formula ##STR1## WHEREIN X is selected from the group consisting of halogen and alkylsulfonyl; R.sup.1 is selected from the group consisting of alkyl, alkenyl, haloalkyl and alkynyl; m is an integer from 0 to 3; Y is selected from the group consisting of oxygen and sulfur; R.sup.2 is selected from the group consisting of alkyl and halogen; and n is an integer from 0 to 2.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: June 27, 1978
    Assignee: Velsicol Chemical Corporation
    Inventors: John Krenzer, Chin Ching Wu
  • Herbicidal thiadiazolylimidazolidinone ester
    Patent number: 4097486
    Abstract: This invention discloses the compound 1-(5-trifluoromethyl-1,3,4-thiadiazol-2-yl)-3,4-dimethyl-5-acetyloxy-1,3-i midazolidin-2-one and its use as a herbicide.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: June 27, 1978
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • Thiadiazolylimidazolidinones
    Patent number: 4093443
    Abstract: The invention discloses compounds of the formula ##STR1## wherein R.sup.1 is selected from the group consisting of alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, alkylsulfonyl and alkylsulfinyl; and R.sup.2 is selected from the group consisting of alkenyl, haloalkenyl and ##STR2## wherein R.sup.3 and R.sup.4 are selected from the group consisting of hydrogen and alkyl.
    Type: Grant
    Filed: April 7, 1977
    Date of Patent: June 6, 1978
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • 1-Thiazolyl-5-phenoxy and phenylthioalkanoyloxyimidazolidinones
    Patent number: 4086240
    Abstract: This invention discloses new compounds of the formula ##STR1## WHEREIN X is selected from the group consisting of halogen and alkylsulfonyl; R.sup.1 is selected from the group consisting of alkyl, alkenyl, haloalkyl and alkynyl; m is an integer from 1 to 3; Y is selected from the group consisting of oxygen and sulfur; Z is selected from the group consisting of alkyl, alkenyl, halogen, haloalkyl, alkoxy, alkylthio, nitro and cyano; and n is an integer from 0 to 3.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: April 25, 1978
    Assignee: Velsicol Chemical Corporation
    Inventors: Chin Ching Wu, John Krenzer
  • 1-Thiadiazolyl-4-methoxymethyl-5-hydroxyimidazolidinones
    Patent number: 4086238
    Abstract: This invention discloses new compounds of the formula ##STR1## wherein R.sup.1 is selected from the group consisting of alkyl, cycloalkyl, alkenyl, haloalkyl, alkoxy, alkylthio, alkylsulfonyl and alkylsulfinyl; and R.sup.2 is selected from the group consisting of alkyl, alkenyl, alkynyl and haloalkyl.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: April 25, 1978
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • Benzothiazolylimidazolidinone esters of furyl and thienyl substituted acids
    Patent number: 4086241
    Abstract: This invention discloses new compounds of the formula ##STR1## WHEREIN X is selected from the group consisting of alkyl, haloalkyl, alkoxy and halogen,; n is an integer from 0 to 2; R.sup.1 is selected from the group consisting of alkyl, alkenyl, haloalkyl and ##STR2## wherein R.sup.3 and R.sup.4 are each selected from the group consisting of hydrogen and alkyl; p is an integer from 0 to 3; Y is oxygen or sulfur; R.sup.2 is selected from the group consisting of alkyl and halogen; and q is an integer from 0 to 2. Further disclosed is the herbicidal utility of the foregoing compounds.
    Type: Grant
    Filed: June 14, 1976
    Date of Patent: April 25, 1978
    Assignee: Velsicol Chemical Corporation
    Inventors: Chin Ching Wu, John Krenzer
  • New thiadiazolylimidazolidinone ester
    Patent number: 4063924
    Abstract: This invention discloses the compound 1-(5-t-butyl-1,3,4-thiadiazol-2-yl)-3,4-dimethyl-5-acetyloxy-1,3-imidazoli din-2-one and its use as a herbicide.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: December 20, 1977
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • Certain 5-acyloxy-1-thiadiazolyl-2-oxoimidazolidine compounds
    Patent number: 4061648
    Abstract: This invention discloses new compounds of the formula ##STR1## WHEREIN R.sup.1 is selected from the group consisting of alkyl, cycloalkyl, alkenyl, haloalkyl, alkoxy, alkylthio, alkylsulfonyl and alkylsulfinyl; R.sup.2 is selected from the group consisting of alkyl, alkenyl, haloalkyl and ##STR2## wherein R.sup.4 and R.sup.5 are each selected from the group consisting of hydrogen and alkyl; p is an integer from 0 to 3; Y is oxygen or sulfur; R.sup.3 is selected from the group consisting of alkyl and halogen; and q is an integer from 0 to 2. Further disclosed is the herbicidal utility of the foregoing compounds.
    Type: Grant
    Filed: March 22, 1976
    Date of Patent: December 6, 1977
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • Thiaoiazolyltetrahydropyrimidinone herbicides
    Patent number: 4056383
    Abstract: The invention discloses compounds of the formula ##STR1## wherein R.sup.1 is selected from the group consisting of alkyl of up to 4 carbon atoms, alkenyl, chloroalkyl, trifluoromethyl, alkoxy, alkylthio, alkylsulfonyl and alkylsulfinyl; and R.sup.2 is selected from the group consisting of alkyl, alkenyl, haloalkyl and ##STR2## wherein R.sup.3 and R.sup.4 are each selected from the group consisting of hydrogen and alkyl.
    Type: Grant
    Filed: June 14, 1976
    Date of Patent: November 1, 1977
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer
  • 1-Benzothiazolyl-5-acyloxyimidazolidinones
    Patent number: 4055569
    Abstract: This invention discloses new compounds of the formula ##STR1## wherein X is selected from the group consisting of alkyl, halogen, haloalkyl and alkoxy; n is an integer from 0 to 2; R.sup.1 is selected from the group consisting of alkyl, alkenyl, haloalkyl and alkynyl; and R.sup.2 is selected from the group consisting of alkyl, alkenyl, haloalkyl, alkynyl, alkoxyalkyl, cycloalkyl and ##STR2## WHEREIN P IS AN INTEGER FROM 0 TO 2; Y is selected from the group consisting of alkyl, alkenyl, halogen, haloalkyl, alkoxy, alkylthio, nitro and cyano; and m is an integer from 0 to 3.
    Type: Grant
    Filed: May 20, 1976
    Date of Patent: October 25, 1977
    Assignee: Velsicol Chemical Corporation
    Inventors: Chin Ching Wu, John Krenzer
  • 1-Benzothiazolyl-5-amino-imidazolidinones
    Patent number: 4054574
    Abstract: This invention discloses new compounds of the formula ##STR1## wherein X is selected from the group consisting of alkyl, halogen, haloalkyl and alkoxy; n is an integer from 0 to 2; R.sup.1 is selected from the group consisting of alkyl, alkenyl, haloalkyl and ##STR2## wherein R.sup.4 and R.sup.5 are each selected from the group consisting of hydrogen and alkyl; and R.sup.2 and R.sup.3 are each selected from the group consisting of hydrogen, alkyl, alkenyl, haloalkyl, hydroxyalkyl, alkoxyalkyl, cycloalkyl and ##STR3## WHEREIN P IS THE INTEGER 0 OR 1; Y is selected from the group consisting of alkyl, alkoxy, alkylthio, halogen, haloalkyl, nitro and cyano; and m is an integer from 0 to 3.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: October 18, 1977
    Assignee: Velsicol Chemical Corporation
    Inventors: Chin Ching Wu, John Krenzer
  • Herbicidal compositions containing 1-thiadiazolyl-6-carbamoyloxytetrahydropyrimidinones and methods therefor
    Patent number: 4053298
    Abstract: Disclosed are new compounds of the formula ##STR1## 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 ##STR2## wherein R.sup.3 and R.sup.4 are each selected from the group consisting of hydrogen and alkyl; R.sup.5 is selected from the group consisting of hydrogen and alkyl; and R.sup.6 is selected from the group consisting of alkyl, cycloalkyl and ##STR3## WHEREIN X is selected from the group consisting of alkyl, halogen, haloalkyl and alkoxy, and n is an integer from 0 to 3. The subject compounds are useful as herbicides.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: October 11, 1977
    Assignee: Velsicol Chemical Corporation
    Inventor: John Krenzer