Patents by Inventor Hellmut Hoffmann

Hellmut Hoffmann 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).

  • O-(2-Carbisopropoxyphenyl)-thiono-phosphoric (phosphonic) acid ester-amides and ester-imides and insecticidal and acaricidal composition and method
    Patent number: 3975523
    Abstract: O-(2-Carbisopropoxyphenyl)-thiono-phosphoric(phosphonic) acid ester-amides and ester-imides of the formula ##SPC1##In whichR is lower alkyl or alkoxy,R' is hydrogen, andR" is a formyl or acetyl radical, orR' and R" conjointly form an aminomethylene, monoalkylaminomethylene or dialkylaminomethylene radical with 1 to 6 carbon atoms in each alkyl chain, or a phenylaminomethylene or heterocyclic aminomethylene radical, or a lower alkoxymethylene radical,Which possess insecticidal and acaricidal properties.
    Type: Grant
    Filed: July 30, 1974
    Date of Patent: August 17, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hellmut Hoffmann, Ingeborg Hammann, Bernhard Homeyer
  • O-[3-methyl-1,3,4-triazol e-(2,3,-b)-thiazol(6)yl]-(thiono)-phosphoric(phosphonic) acid esters
    Patent number: 3974171
    Abstract: O-[3-methyl-1,2,4-triazole-(2,3-b)-thiazol(6)yl]-(thiono)-phosphoric(phosph onic) acid esters of the formula ##EQU1## in which R is alkyl with 1 to 6 carbon atoms,R' is alkyl with 1 to 4 carbon atoms, alkoxy with 1 to 6 carbon atoms or phenyl,R" is amino, monoalkylamino or dialkylamino with 1 to 4 carbon atoms in each alkyl moiety or alkoxy with 1 to 6 carbon atoms, andX is oxygen or sulfur,Which possess insecticidal and acaricidal properties.
    Type: Grant
    Filed: October 7, 1974
    Date of Patent: August 10, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hellmut Hoffmann, Ingeborg Hammann, Wolfgang Behrenz, Wilhelm Stendel
  • Pesticidal N-(O-S-dialkyl(thionol)-thiolPhosphoryl)-iminoformic acid alkyl esters
    Patent number: 3957979
    Abstract: N-(O,S-dialkyl(thiono)-thiolphosphoryl)-iminoformic acid alkyl esters of the general formula ##EQU1## in which X is oxygen or sulfur, andR, r' and R" each independently is lower alkyl with 1 to 6 carbon atoms,Which possess insecticidal and acaricidal properties.
    Type: Grant
    Filed: February 27, 1975
    Date of Patent: May 18, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hellmut Hoffmann, Ingeborg Hammann
  • O-Alkyl-o-[3-methyl-1,2,4-triazolo-(2,3,b )-thiazol(6)-yl](thiono)-phosphoric (phosphonic) acid esters
    Patent number: 3957977
    Abstract: O-Alkyl-O-[3-methyl-1,2,4-triazolo-(2,3,b)-thiazol(6)-yl]-(thiono)-phosphor ic (phosphonic) acid esters of the formula ##SPC1##In whichR is alkyl with 1 to 6 carbon atoms,R' is alkyl with 1 to 4 carbon atoms, alkoxy with 1 to 6 carbon atoms or phenyl,R" is alkyl with 1 to 3 carbon atoms or alkylmercapto with 1 to 3 carbon atoms, andX is oxygen or sulfur,Which possess insecticidal and acaricidal properties.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: May 18, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hellmut Hoffmann, Ingeborg Hammann, Wolfgang Behrenz, Wilhelm Stendel
  • Compositions and methods of combatting insects and acarids using pyrazolo-(thiono)-phosphoric(phosphonic) acid esters
    Patent number: 3952098
    Abstract: Pyrazolo-(thiono)-phosphoric(phosphonic) acid esters of the general formula ##SPC1##In whichR is alkyl with 1-6 carbon atoms,R.sub.1 is alkyl or alkoxy with 1-6 carbon atoms,R.sub.2 is alkyl with 2-4 carbon atoms, andY is oxygen or sulfur,Which possess insecticidal, acaricidal, rodenticidal, fungicidal and nematocidal properties.
    Type: Grant
    Filed: June 29, 1973
    Date of Patent: April 20, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hellmut Hoffmann, Ingeborg Hammann, Gunter Unterstenhofer
  • O-pyrazolopyrimidine-(thiono)-phosphoric(phosphonic) acid esters
    Patent number: 3950337
    Abstract: O-pyrazolopyrimidine-(thiono)-phosphoric (phosphonic) acid esters of the formula ##SPC1##In whichR.sub.1 is alkyl of 1 to 6 carbon atoms,R.sub.2 is alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 6 carbon atoms or phenyl,R.sub.3 is hydrogen, chlorine or bromine, andX denotes oxygen or sulfur, which possess insecticidal and acaricidal properties.
    Type: Grant
    Filed: August 8, 1973
    Date of Patent: April 13, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hellmut Hoffmann, Ingeborg Hammann
  • N-[N',N'-disubstituted-aminomethylidene]-(thiono)thiol-phosphoric acid ester imides
    Patent number: 3949022
    Abstract: N-[N',N'-disubstituted-aminomethylidene]-(thiono)thiolphosphoric acid ester imides of the formula ##EQU1## in which R is alkyl with 1 to 6 carbon atoms,R' is alkyl, alkenyl or alkynyl with up to 6 carbon atoms, lower alkylmercapto-lower alkyl or N-alkyl-carbamoylmethyl,R" and R'" each independently is alkyl or alkenyl with up to 6 carbon atoms, or conjointly with the nitrogen atom form a heterocyclic ring, and X is oxygen or sulfur,Which possess insecticidal, acaricidal and nematocidal properties.
    Type: Grant
    Filed: January 21, 1974
    Date of Patent: April 6, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hellmut Hoffmann, Ingeborg Hammann, Gunter Unterstenhofer
  • N-(N,N-disubstituted-aminomethylidene)-(thiono)thiol-phosphoric acid esters amides
    Patent number: 3940457
    Abstract: N-[O-Alkyl-S-aliphatic-(thiono)-thiolphosphoryl]iminoformic acid alkyl esters of the general formula ##EQU1## in which R is alkyl with 1 to 6 carbon atoms,R' is alkenyl or alkynyl with up to 6 carbon atoms, lower alkylmercapto-lower alkyl or N-alkylcarbamoylmethyl,X is oxygen or sulfur, andAlk is an alkyl radical with 1 to 6 carbon atoms,Which possess insecticidal and acaricidal properties.
    Type: Grant
    Filed: September 12, 1974
    Date of Patent: February 24, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hellmut Hoffmann, Ingeborg Hammann, Gunter Unterstenhofer