Patents by Inventor Masahiro Aya

Masahiro Aya 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).

  • Synergistic herbicidal compositions
    Patent number: 3996039
    Abstract: Herbicidal compositions comprising as active ingredients1. an amidothionophosphoric acid ester derivative of the general formula ##STR1## wherein R.sup.1 and R.sup.2 are alkyl of from 1 to 6, preferably 1 to 4, carbon atoms,R.sup.3 is hydrogen or alkyl of from 1 to 6, preferably 1 to 4, carbon atoms and2. a urea derivative of the formula ##STR2## alone or in admixture with a solid or liquid or liquefied gaseous diluent or carrier; are outstandingly effective as herbicides and display synergistic potency.
    Type: Grant
    Filed: August 6, 1974
    Date of Patent: December 7, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Masahiro Aya, Nubuo Fukazawa, Itsuro Kobori
  • Novel amidoth ionophosphoric acid esters and their use as herbicides
    Patent number: 3996041
    Abstract: Amidothionophosphonic acid ester compounds of the formula: ##STR1## in which R is alkyl of from 1 to 6 carbon atoms or lower cycloalkyl;Y is hydrogen, halogen or alkyl or alkoxy of from 1 to 6 carbon atoms; andZ is nitro or cyano;Are outstandingly effective as herbicides and exhibit particularly selective action.
    Type: Grant
    Filed: April 16, 1975
    Date of Patent: December 7, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Masahiro Aya, Shigeo Kishino, Nobuo Fukazawa, Toyohiko Kume
  • Novel cyclohexyl carbamates and herbicidal and acaricidal compositions
    Patent number: 3978107
    Abstract: Certain new cyclohexyl carbamates of the formula: ##EQU1## wherein X is hydrogen, halogen, lower alkyl or lower alkoxy,R is hydrogen or methyl, andn is 1, 2, or 3,Are outstandingly effective herbicides and acaricides and have found particular applicability in selectively combating weeds growing in paddy fields.
    Type: Grant
    Filed: May 10, 1971
    Date of Patent: August 31, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Masahiro Aya, Akio Kudamatsu, Masao Miyamoto, Nobuo Fukazawa, Shigeki Osuga
  • Phosphoro-amido-thioates
    Patent number: 3948631
    Abstract: Phosphoro-amido-thioates, i.e. O-alkyl-O-[2-nitro-4-(alkyl, alkoxy and chloro)-phenyl]-N-alkyl-phosphoro-amido-thioates and O-alkyl-O-[2-nitro-4-(optionally alkyl, alkoxy and chloro)-phenyl]-N-cycloalkyl-phosphoro-amido-thioates, or O-alkyl-O-[2-nitro-4-(alkyl, alkoxy and chloro)-phenyl]-N-alkyl-amido-thionophosphates and O-alkyl-O-[2-nitro-4-(optionally alkyl, alkoxy and chloro)-phenyl]-N-cycloalkyl-amido-thionophosphates, which possess herbicidal properties and which may be produced by conventional methods.
    Type: Grant
    Filed: August 1, 1973
    Date of Patent: April 6, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerhard Schrader, Ludwig Eue, Helmuth Hack, Seiichi Hirane, Masahiro Aya, Shigeo Kishino, Nobuo Fukazawa