Patents by Inventor Christo Drandarevski

Christo Drandarevski 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).

  • Benzoylureas
    Patent number: 5607977
    Abstract: Compounds of the formula ##STR1## wherein R.sub.1 is fluorine, chlorine, bromine or iodine; and A is 2,6-difluorophenyl, 2-chlorophenyl, 2-chloro-6-fluorophenyl, 2,6-dichlorophenyl or 2-fluorophenyl,with the proviso that when R.sub.1 is chlorine, A is other than 2,6-dichlorophenyl, useful as pesticides.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: March 4, 1997
    Assignee: Shell Agrar GmbH & Co. KG
    Inventors: Heinz-Manfred Becher, Christo Drandarevski, Rudolf Mengel, Walter Ost
  • Device for transcuticular application of active substance to plants
    Patent number: 5343653
    Abstract: A device for the transcuticular administration of active substances to plants, and a method of using the same to treat plants with fungicidal, herbicidal, insecticidal and/or acaricidal substances.
    Type: Grant
    Filed: September 27, 1993
    Date of Patent: September 6, 1994
    Assignee: Celaflor GmbII
    Inventors: Hanshelmut Itzel, Bernd Zierenberg, Christo Drandarevski, Wilfried Heupt
  • Device for transcuticular application of active substances to plants
    Patent number: 5201925
    Abstract: A device for the transcuticular administration of active substances to plants, and a method of using the same to treat plants with fungicidal, herbicidal, insecticidal and/or acaricidal substances.
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: April 13, 1993
    Assignee: Celaflor GmbH
    Inventors: Hanshelmut Itzel, Bernd Zierenberg, Christo Drandarevski, Wilfried Heupt
  • Phosphonium salts and fungicidal use
    Patent number: 4933328
    Abstract: The invention provides fungicidal compositions containing phosphonium salts of formula: ##STR1## in which n represents 0, 1, 2 or 3, R represents a halogen atom or an optionally substituted alkyl, haloalkyl, alkoxy or haloalkyl group, R.sup.1, R.sup.2 and R.sup.3 independently represent an optionally substituted alkyl, cycloalkyl, phenyl or benzyl group and X represents an anion; certain novel phosphonium salts, a process for the preparation of such compounds and a method of combating plant pathogenic fungi using such compositions or compounds.
    Type: Grant
    Filed: July 18, 1988
    Date of Patent: June 12, 1990
    Assignee: Shell Internationale Research Maatshappij B.V.
    Inventors: Jurgen Curtze, Christo Drandarevski, Guido Albert, Arthur A. Ramsey
  • Acrylic acid morpholides, fungicidal compositions and use
    Patent number: 4910200
    Abstract: Compounds of the formula ##STR1## wherein A is ##STR2## B is ##STR3## R.sup.1 is hydrogen; halogen, cyano or optionally substituted C.sub.1-4 alkyl; andQ is NR.sup.8 R.sup.9 or ##STR4## where R.sup.2 to R.sup.11 are substituents of various types. The compounds are useful as fungicides.
    Type: Grant
    Filed: October 9, 1986
    Date of Patent: March 20, 1990
    Assignee: Celamerck GmbH & Co. KG
    Inventors: Jurgen Curtze, Helmut Pieper, Josef Nickl, Heinz-Manfred Becher, Guido Albert, Christo Drandarevski, Sigmund Lust, Ludwig Schroder
  • Acrylic acid heterocyclic amides, fungicidal compositions and use
    Patent number: 4753934
    Abstract: Compounds of the formula ##STR1## wherein A, B, R.sub.1, X and Q are substituents of various types, and acid addition salts thereof. The compounds are useful as fungicides.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: June 28, 1988
    Assignee: Celamerck GmbH & Co. KG
    Inventors: Josef Nickl, Helmut Pieper, Jurgen Curtze, Christo Drandarevski, Sigmund Lust
  • Herbicidal imidazolinones
    Patent number: 4723989
    Abstract: Compounds of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.9 and R.sub.10 have diverse meanings. They are useful as herbicides.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: February 9, 1988
    Assignee: Celarmerck GmbH & Co. KG
    Inventors: Wolfgang Buck, Manfred Garrecht, Gerhart Schneider, Christo Drandarevski
  • Urea derivatives having a pesticidal activity
    Patent number: 4478852
    Abstract: The present invention relates to new urea derivatives having pesticidal activity, particularly fungicidal activity. The urea derivatives, according to the invention, have the general formula ##STR1## wherein X, Y and Z represent hydrogen or halogen atoms and at least one of the substituents X, Y or Z is a halogen atom.
    Type: Grant
    Filed: May 12, 1982
    Date of Patent: October 23, 1984
    Assignee: Celamerck GmbH & Co. KG.
    Inventors: Heinz-Manfred Becher, Christo A. Drandarevski, Sigmund Lust