Patents by Inventor David Cheong King Chan

David Cheong King 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).

  • Fungicidal, miticidal and ovicidal alkoxycarbonylalkyl-substituted and carbamylalkyl-substituted N-haloalkylthiosulfonamides
    Patent number: 4112237
    Abstract: Fungi, mites and mite eggs are killed by applying thereto sulfonamides of the formula ##STR1## wherein R and R.sup.1 individually are alkyl, cycloalkyl, aryl, carbamylalkyl, or alkoxycarbonylalkyl and R.sup.2 is haloalkyl, with the proviso that one R or R.sup.1 group is carbamylalkyl or alkoxycarbonylalkyl.
    Type: Grant
    Filed: October 22, 1976
    Date of Patent: September 5, 1978
    Assignee: Chevron Research Company
    Inventor: David Cheong King Chan
  • Fungicidal 3-(N-acyl-N-arylamino) lactones and lactams
    Patent number: 4107323
    Abstract: 3-(N-acyl-N-arylamino)-gamma-lactones, delta-lactones, gamma-lactams and delta-lactams have fungicidal activity.
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: August 15, 1978
    Assignee: Chevron Research Company
    Inventor: David Cheong King Chan
  • Fungicidal and herbicidal alpha-haloacetanilides
    Patent number: 4096167
    Abstract: Fungicidal and herbicidal alpha-haloacetanilides of the formula: ##STR1## wherein R.sup.1 is alkyl, R.sup.2 is hydrogen or alkyl; R.sup.3 is hydrogen or alkyl; X is halo; and Y is --SR.sup.4 or --NR.sup.5 R.sup.6 wherein R.sup.4 is alkyl, alkenyl or phenylalkyl, R.sup.5 is hydrogen, alkyl, alkenyl or alkynyl and R.sup.6 is hydrogen, alkyl, alkenyl or alkynyl, with the proviso that R.sup.5 and R.sup.6 may be joined to form a divalent alkylene group or --CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 --, are prepared from N-phenylamino thioacetates.
    Type: Grant
    Filed: February 17, 1977
    Date of Patent: June 20, 1978
    Assignee: Chevron Research Company
    Inventor: David Cheong King Chan
  • 1,3-Benzoxazin-4-one derivatives and their use as ovicides
    Patent number: 4036960
    Abstract: Compounds of the formula ##STR1## wherein X is halogen of atomic number 9 through 35, i.e., fluorine, chlorine or bromine, or alkyl of 1 to 3 carbon atoms, n is 0, 1 or 2, and R and R.sup.1 are individually hydrogen, methyl or ethyl, possess acarid ovicidal activity.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: July 19, 1977
    Assignee: Chevron Research Company
    Inventor: David Cheong King Chan
  • 3-Halohydrocarbylthio-1,2,3-benzoxathiazin-4-(3H)-one 2-oxides
    Patent number: 4018920
    Abstract: Compounds of the formula ##STR1## wherein R is an alkyl group or an alkenyl group, each substituted with 1 to 5 halogen atoms of atomic number 9 to 35, and X is halogen of atomic number 9 to 35, nitro, cyano, lower alkyl, lower alkoxy or trifluoromethyl and n is 0 or an integer of 1 to 3, possess fungicidal activity.
    Type: Grant
    Filed: April 1, 1976
    Date of Patent: April 19, 1977
    Assignee: Chevron Research Company
    Inventor: David Cheong King Chan
  • Fungicidal 3-(N-acyl-N-arylamino) lactones and lactams
    Patent number: 4012519
    Abstract: 3-(N-acyl-N-arylamino)-gamma-lactones, delta-lactones, gamma-lactams and delta-lactams have fungicidal activity.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: March 15, 1977
    Assignee: Chevron Research Company
    Inventor: David Cheong King Chan
  • Herbicidal N-(N'-alkynylcarbamylmethyl) 2,6-dialkyl-alpha-haloacetanilides
    Patent number: 3997326
    Abstract: N-(N'-alkynylcarbamylmethyl)-2,6-dialkyl-alpha-haloacetanilides have herbicidal activity, particularly in preemergent applications against grassy weeds.
    Type: Grant
    Filed: February 23, 1976
    Date of Patent: December 14, 1976
    Assignee: Chevron Research Company
    Inventor: David Cheong King Chan
  • Herbicidal N-alkylsulfoxymethyl-and-N-alkylsulfonyl-methyl-N-aryl
    Patent number: 3978123
    Abstract: Compounds of the formula ##EQU1## wherein R is alkyl of 1 to 6 carbon atoms or aryl of 6 to 12 carbon atoms substituted with 0 to 5 halogen atoms of atomic number 9 to 35, nitro groups, alkyl groups of 1 to 4 carbon atoms or alkoxy groups of 1 to 4 carbon atoms; one of R.sup.1 or R.sup.2 is alkyl of 1 to 6 carbon atoms or cycloalkyl of 5 to 6 carbon atoms and the other is aryl of 6 to 12 carbon atoms substituted with 0 to 5 halogen atoms of atomic number 9 to 35, nitro groups, alkyl groups of 1 to 4 carbon atoms or alkyoxy groups of 1 to 4 carbon atoms or trifluoromethyl; R.sup.3 is hydrogen or alkyl of 1 to 4 carbon atoms and X is sulfur, SO, SO.sub.2 or oxygen, with the proviso that when X is oxygen, R.sup.1 is aryl or substituted aryl. The ureas find use as herbicides in both pre- and post-emergent applications.
    Type: Grant
    Filed: October 29, 1974
    Date of Patent: August 31, 1976
    Assignee: Chevron Research Company
    Inventor: David Cheong King Chan
  • Herbicidal N-(N'-alkynylcarbamylmethyl)-2,6-dialkyl-.alpha.-haloacetanilides
    Patent number: 3944607
    Abstract: N-(N'alkynylcarbamylmethyl)-2,6-dialkyl-.alpha.-haloacetanilides have herbicidal activity, particularly in pre-emergent applications against grassy weeds.
    Type: Grant
    Filed: October 17, 1974
    Date of Patent: March 16, 1976
    Assignee: Chevron Research Company
    Inventor: David Cheong King Chan
  • 3-(N-acyl-N-arylamino) lactones
    Patent number: 3933860
    Abstract: 3-(N-acyl-N-arylamino)-.gamma.-lactones, .delta.-lactones, .gamma.-lactams and .delta.-lactams have fungicidal activity.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: January 20, 1976
    Assignee: Chevron Research Company
    Inventor: David Cheong King Chan