Patents by Inventor Hak-Foon Chan

Hak-Foon Chan 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).

  • Patent number: 5216007
    Abstract: This invention relates to substituted ethylenic imidazoles and triazoles, their enantiomorphs, acid addition salts and metal complexes as well as their methods of preparation and use as broad spectrum systemic fungicides useful in controlling phytopathogenic fungi such as barley net blotch (Helminthosporium teres), bean powdery mildew (Erysiphe polygoni), peanut cercospora (Cercospora arachidicola), and wheat stem rust (Puccinia graminis f. sp. tritici race 15B-2).
    Type: Grant
    Filed: January 15, 1992
    Date of Patent: June 1, 1993
    Assignee: Rohm and Haas Company
    Inventors: George A. Miller, Hak-Foon Chan
  • Patent number: 5192783
    Abstract: This invention relates to 1 and 4-aralkyl-1,2,4-triazoles, their enantiomorphs, acid addition salts and metal salt complexes. This invention also relates to the method of preparation and use of these compounds. These compounds are highly active broad-spectrum systemic fungicides effective in controlling phytopathogenic fungi such as barley net blotch (Helminthosporium teres), grey mold (Botrytis cinerea), bean powdery mildew (Erysiphe polygoni), grape downy mildew (Plasmopora viticola), rice blast (Piricularia oryzae), tomato late blight (Phytophthora infestans) and wheat stem rust (Puccinia graminis f. sp. tritici race 15B-2).
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: March 9, 1993
    Assignee: Rohm and Haas Company
    Inventors: George A. Miller, Hak-Foon Chan, Hak-Foon Chan
  • Patent number: 4753957
    Abstract: This invention relates to substituted 2,4-imidazolidinediones, their method of preparation and use as broad spectrum systemic fungicides effective in controlling phytopathogenic fungi such as barley net blotch (Helminthosporium teres), bean powdery mildew (Erysiphi polygoni), grape downy mildew (Plasmorpora viticola), tomato late blight (Phytophthora infestans), and wheat stem rust (Puccinia graminis f. sp. tritici race 15 B-2.
    Type: Grant
    Filed: September 28, 1981
    Date of Patent: June 28, 1988
    Assignee: Rohm and Haas Company
    Inventor: Hak-Foon Chan
  • Patent number: 4675316
    Abstract: This invention relates to substituted azoylmethylarylsulfides, sulfoxides and sulfones, their agronomically acceptable acid addition salts, their method of preparation and their pesticidal use, especially their use as highly active fungicides.
    Type: Grant
    Filed: March 10, 1978
    Date of Patent: June 23, 1987
    Assignee: Rohm and Haas Company
    Inventor: Hak-Foon Chan
  • Patent number: 4414210
    Abstract: This invention relates to 2-hydroxyarylethyl-1,2,4-triazoles, their acid addition salts and metal salt complexes. This invention also relates to the method of preparation and use of these compounds. These compounds and salts thereof are highly active broad-spectrum systemic fungicides effective in controlling phytopathogenic fungi such as barley net blotch (Helminthosporium teres), grey mold (Botrytis fabae), bean powdery mildew (Erysiphe polygoni), grape downy mildew (Plasmopora viticola), rice blast (Piricularia oryzae), tomato late blight (Phytophthora infestans) and wheat stem rust (Puccinia graminis f. sp. tritici race 158-2).
    Type: Grant
    Filed: May 19, 1981
    Date of Patent: November 8, 1983
    Assignee: Rohm and Haas Company
    Inventors: George A. Miller, Hak-Foon Chan
  • Patent number: 4413003
    Abstract: This invention relates to .beta.-hydroxyarylethylimidazoles, their enantiomorphs, acid addition salts and metal salt complexes. This invention also relates to the method of preparation and use of these compounds. These compounds and salts thereof are highly active broad-spectrum systemic fungicides effective in controlling phytopathgogenic fungi such as barley net blotch (Helminthosporium teres), grey mold (Botrytis cinerea), bean powdery mildew (Erysiphe polygoni), grape downy mildew (Plasmopora viticola), rice blast (Piricularia oryzae), tomato late blight (Phytophthora infestans), and wheat stem rust (Puccinia graminis f. sp. tritici race 15B-2).
    Type: Grant
    Filed: July 29, 1977
    Date of Patent: November 1, 1983
    Assignee: Rohm and Haas Company
    Inventors: George A. Miller, Hak-Foon Chan
  • Patent number: 4372972
    Abstract: This invention relates to N-substituted alkynyl anilines, methods for their preparation and their use as systemic eradicant phytopathogenic fungicides which are useful in controlling Oomycetes.
    Type: Grant
    Filed: September 14, 1979
    Date of Patent: February 8, 1983
    Assignee: Rohm and Haas Company
    Inventor: Hak-Foon Chan
  • Patent number: 4366165
    Abstract: This invention relates to 1 and 4-arylcyanoalkyl-1,2,4-triazoles, their enantiomorphs, and acid addition salts and metal salt complexes. This invention also relates to the method of preparation and use of these compounds. These compounds enantiomorphs, salts and complexes are highly active broad-spectrum systemic fungicides effective in controlling phytopathogenic fungi such as barley net blotch (Helminthosporium teres), grey mold (Botrytis cinerea), bean powdery mildew (Erysiphe polygoni), grape downy mildew (Plasmopora viticola), rice blast (Piricularia oryzae), tomato late blight (Phytophthora infestans) and wheat stem rust (Puccinia graminis f. sp. tritici race 15B-2).
    Type: Grant
    Filed: February 11, 1981
    Date of Patent: December 28, 1982
    Assignee: Rohm and Haas Company
    Inventors: George A. Miller, Hak-Foon Chan
  • Patent number: 4351839
    Abstract: This invention relates to 2-aryl-2-1-H-azoyl-(alkyl)gamma-butyrolactone of the formula: ##STR1## wherein Z is optionally substituted aryl;R is hydrogen, alkyl, alkenyl, alkynyl, optionally substituted aryl or optionally substituted aralkyl;Azo is 1-H-imidiazoyl, 1-H-1,2,4-triazoyl or 4-H-1,2,4-triazoyl;n is zero or an integer from 1 to 5, and the agronomically acceptable acid addition salts and metal salt complexes thereof, methods for their preparation and their use as pesticides.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: September 28, 1982
    Assignee: Rohm and Haas Company
    Inventor: Hak-Foon Chan
  • Patent number: 4259339
    Abstract: This invention relates to phenoxy, phenylthio, phenylsulfinyl and phenylsulfonyl substituted cyano aralkyl imidazoles and triazoles, their enantiomorphs, acid addition salts and metal salt complexes thereof as well as their methods of preparation and use as broad spectrum systemic fungicides useful in controlling phytopathogenic fungi.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: March 31, 1981
    Assignee: Rohm and Haas Company
    Inventors: George A. Miller, Hak-Foon Chan
  • Patent number: 4225723
    Abstract: This invention relates to a process for the preparation of substituted arylcyanoalkyl and diarylcyanoalkylimidazoles, their acid addition salts and their metal salt complexes. These compounds are useful as broad spectrum protectant-eradicant fungicides.
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: September 30, 1980
    Assignee: Rohm and Haas Company
    Inventors: George A. Miller, Hak-Foon Chan, Harold E. Carley
  • Patent number: 4182862
    Abstract: This invention involves an improved process for the preparation of pesticidal 1,3-disubstituted-2-azoyl-2-propen-1-ones from the corresponding dibromoketones and azoles at a temperature from about 60.degree. C. to 180.degree. C. either neat or in the presence of an inert solvent.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: January 8, 1980
    Assignee: Rohm and Haas Company
    Inventor: Hak-Foon Chan
  • Patent number: 4167576
    Abstract: This invention relates to phenoxy, phenylthio, phenylsulfinyl and phenylsulfonyl substituted cyano aralkyl imidazoles and triazoles, their enantiomorphs, acid addition salts and metal salt complexes thereof as well as their methods of preparation and use as broad spectrum systemic fungicides useful in controlling phytopathogenic fungi.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: September 11, 1979
    Assignee: Rohm and Haas Company
    Inventors: George A. Miller, Hak-Foon Chan
  • Patent number: 4143137
    Abstract: This invention relates to substituted arylcyanoalkyl and diarylcyanoalkylimidazoles, their acid addition salts and their metal salt complexes and their use as broad spectrum protectant-eradicant fungicides.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: March 6, 1979
    Assignee: Rohm and Haas Company
    Inventors: George A. Miller, Hak-Foon Chan, Harold E. Carley
  • Patent number: 4118461
    Abstract: This disclosure describes novel aralkyl imidazoles, their acid addition salts, their metal complex salts and processes for their preparation. These compounds possess biological activity and in particular are useful as systemic protectant/eradicant fungicidal agents for controlling plant diseases caused by fungi and as plant growth regulators. The metal complex salts of these compounds are particularly useful in their ability to reduce undesirable plant growth regulatory activity and phytotoxicity while retaining their ability for controlling plant diseases caused by fungi.
    Type: Grant
    Filed: November 12, 1976
    Date of Patent: October 3, 1978
    Assignee: Rohm and Haas Company
    Inventors: George A. Miller, Hak-Foon Chan
  • Patent number: 4079146
    Abstract: This invention is concerned with metal salts of mixed dithiocarbamic acids, the process for their preparation and their biological activity. In particular, these salts are useful as broad spectrum fungicidal agents.
    Type: Grant
    Filed: September 26, 1975
    Date of Patent: March 14, 1978
    Assignee: Rohm and Haas Company
    Inventors: George Allen Miller, Harold Edwin Carley, Hak-Foon Chan
  • Patent number: 4073921
    Abstract: This invention relates to substituted arylcyanoalkyl and diarylcyanoalkylimidazoles, their acid addition salts and their metal salt complexes and their use as broad spectrum protectant-eradicant fungicides.
    Type: Grant
    Filed: January 7, 1976
    Date of Patent: February 14, 1978
    Assignee: Rohm and Haas Company
    Inventors: George A. Miller, Hak-Foon Chan, Harold E. Carley