Patents by Inventor Wan-Kit Chan

Wan-Kit 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: 4758586
    Abstract: Indolyl dieneoic acids and esters are disclosed possessing valuable pharmaceutical activity, particularly as lipoxygenase inhibitors with anti-inflammatory and anti-allergic properties.
    Type: Grant
    Filed: January 21, 1986
    Date of Patent: July 19, 1988
    Assignee: USV Pharmaceutical Corp.
    Inventors: Wan-kit Chan, Thomas D. Lee, Fu-chih Huang
  • Patent number: 4722939
    Abstract: This invention relates to novel compounds having pharmaceutical activity and having the general structure ##STR1## wherein the Z, R.sub.1, R.sub.2, R.sub.3, R.sub.4, n and m are defined within.
    Type: Grant
    Filed: December 4, 1984
    Date of Patent: February 2, 1988
    Assignee: USV Pharmaceutical Corporation
    Inventors: Bernard Loev, Howard Jones, Wan-kit Chan
  • Patent number: 4694023
    Abstract: Polyolefinic compounds represented by the general formula ##STR1## in which R and R.sub.1 are each hydrogen or an alkyl group of from 1 to 5 carbon atoms; R.sub.2 is an alkyl group of from 1 to 5 carbon atoms; R.sub.3 is hydroxyl, alkoxy of from 1 to 5 carbon atoms, NH.sub.2, NHR.sub.2 or NR.sub.2 R.sub.2 and Z is a cycloalkyl, cycloalkenyl or cycloalkdienyl group substituted with from 0 to 5 alkyl groups, a keto group or a hydroxyl group or a phenyl group substituted with from 0 to 4 hydroxy, alkoxy, alkyl or trifluoromethyl groups or halogen atoms or combinations thereof and the pharmaceutically-acceptable salts thereof.The foregoing compounds have been found to be effective in the treatment of psoriasis, inflammatory conditions and allergic responses.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: September 15, 1987
    Assignee: USV Pharmaceutical Corporation
    Inventors: Bernard Loev, Wan-kit Chan, Howard Jones
  • Patent number: 4659711
    Abstract: Compounds of the general formula ##STR1## and their pharmaceutically-acceptable salts, wherein the substituents are as defined herein, having antihypertensive activity.
    Type: Grant
    Filed: October 4, 1985
    Date of Patent: April 21, 1987
    Assignee: USV Pharmaceutical Corporation
    Inventors: Fu-chin Huang, Howard Jones, Wan-Kit Chan
  • Patent number: 4621099
    Abstract: Polyene compounds represented by the formula ##STR1## in which R is H, lower alkyl of from 1 to 8 carbon atoms or aralkyl;R.sub.1 is H or lower alkyl of from 1 to 5 carbon atoms; andY is carboxy, alkoxycarbonyl, alkenyloxycarbonyl, aralkoxycarbonyl, tetrazolyl or ##STR2## wherein R is H, lower alkyl of from 1 to 8 carbon atoms or aralkyl; and pharmaceutically acceptable salts thereof.The foregoing compounds have been found active in regulating the formation of lipoxygenase and as such possess therapeutic value in the treatment of inflammatory conditions and allergic responses.
    Type: Grant
    Filed: September 23, 1985
    Date of Patent: November 4, 1986
    Assignee: USV Pharmaceutical Corporation
    Inventors: Bernard Loev, Wan-Kit Chan
  • Patent number: 4619945
    Abstract: Polyene compounds represented by the formula ##STR1## where R is H or lower alkyl of from 1 to 5 carbon atoms;R.sub.1 is H, lower alkyl of from 1 to 8 carbon atoms or aralkyl; andR.sub.2 is (CH.sub.2).sub.n CH.sub.2 OH, CHO or CO.sub.2 R; wherein n is 1 or 2.The foregoing compounds have been found active in regulating the formation of lipoxygenase and as such possess therapeutic value in the treatment of inflammatory conditions and allergic responses.
    Type: Grant
    Filed: October 9, 1985
    Date of Patent: October 28, 1986
    Assignee: USV Pharmaceutical Corp
    Inventors: Bernard Loev, Wan-Kit Chan
  • Patent number: 4614747
    Abstract: This invention relates to novel compounds having pharmaceutical activity and having the general structure ##STR1## wherein the Z, R.sub.1, R.sub.2, R.sub.3, R.sub.4, n and m are defined within.
    Type: Grant
    Filed: November 29, 1984
    Date of Patent: September 30, 1986
    Assignee: USV Pharmaceutical Corp.
    Inventors: Bernard Loev, Howard Jones, Wan-kit Chan
  • Patent number: 4605675
    Abstract: Polyene compounds represented by the formula ##STR1## in which R is H or an alkyl group of from 1 to 5 carbon atoms, R.sub.1 is H, lower alkyl of from 1 to 8 carbon atoms or aralkyl, and the pharmaceutically acceptable salts thereof.The foregoing compounds have been found active in regulating phospholipases and as such possess therapeutic value in the treatment of inflammatory conditions.
    Type: Grant
    Filed: October 16, 1985
    Date of Patent: August 12, 1986
    Assignee: USV Pharmaceutical Corp.
    Inventors: Bernard Loev, Wan-Kit Chan
  • Patent number: 4595696
    Abstract: Polyene compounds represented by the general formula ##STR1## where R.dbd.H or lower alkyl group of from 1 to 5 carbon atoms ##STR2## n is 0-1 x is O or S; andR.sub.1 =an alkyl group of from 1 to 5 carbon atoms; and the pharmaceutically acceptable salts thereof.and the pharmaceutically acceptable salts thereof.The foregoing compounds have been found to be effective in regulating the formation of lipoxygenese and as such possess therapeutic value in the treatment of inflammatory conditions and allergic responses.
    Type: Grant
    Filed: September 13, 1985
    Date of Patent: June 17, 1986
    Assignee: USV Pharmaceutical Corp.
    Inventors: Bernard Loev, Wan-Kit Chan
  • Patent number: 4567279
    Abstract: This invention relates to new chemical compounds which possess valuable therapeutic activity particularly as lipoxygenase inhibitors possessing antiflammatory and antiallergic properties. The present new compounds are of the formula: ##STR1## wherein, Z and Z.sub.1 each are alkylene chains containing up to three carbon atoms in the principal chain and a total of up to five carbon atoms and include from 0-1 double bonds;R is H or lower alkyl;R.sub.1 and R.sub.2 each are H, lower alkyl, OH, lower alkoxy, benzyloxy, carboxy, alkylenecarboxyl or alkylcarbonyl.R.sub.3 is H, lower alkyl, aralkyl or lower alkanoyl; andX is --O(CH.sub.2).sub.n --, --CH.dbd.CH--, --(CH.sub.2).sub.n --, --S(CH.sub.2).sub.n -- or ##STR2## n=0 or 1 n'=1 or 2.
    Type: Grant
    Filed: December 13, 1984
    Date of Patent: January 28, 1986
    Assignee: USV Pharmaceutical Corp.
    Inventor: Wan-kit Chan
  • Patent number: 4534979
    Abstract: Polyene compounds represented by the general formulae ##STR1## in which: R and R.sub.1 are each hydrogen or an alkyl group of from 1 to 5 carbon atoms;R.sub.2 is an alkyl group of from 1 to 5 carbon atoms;R.sub.3 is hydroxyl, alkoxy of from 1 to 5 carbon atoms, NH.sub.2, NHR.sub.2 or NR.sub.2 R.sub.2 and Z is a cycloalkyl, cycloalkenyl or cycloalkdienyl group substituted with from 0 to 5 alkyl groups, a keto group or a hydroxyl group or a phenyl group substituted with from 0 to 4 hydroxy, alkoxy, alkyl, aryloxy, aralkyloxy or trifluoromethyl groups or halogen atoms or combinations thereof and the pharmaceutically-acceptable salts thereof.The foregoing compounds have been found to be effective in the treatment of psoriasis, inflammatory conditions and allergic responses.
    Type: Grant
    Filed: November 2, 1984
    Date of Patent: August 13, 1985
    Assignee: USV Pharmaceutical Corp.
    Inventors: Bernard Loev, Wan-Kit Chan, Howard Jones
  • Patent number: 4523042
    Abstract: This invention relates to novel compounds having pharmaceutical activity and having the general structure ##STR1## wherein the Z, R.sub.1, R.sub.2, R.sub.3, R.sub.4, n and m are defined within.
    Type: Grant
    Filed: July 29, 1983
    Date of Patent: June 11, 1985
    Assignee: USV Pharmaceutical
    Inventors: Bernard Loev, Howard Jones, Wan-kit Chan
  • Patent number: 4505930
    Abstract: Polyolefinic compounds represented by the general formula ##STR1## in which R and R.sub.1 are each hydrogen or an alkyl group of from 1 to 5 carbon atoms; R.sub.2 is an alkyl group of from 1 to 5 carbon atoms; R.sub.3 is hydroxyl, alkoxy of from 1 to 5 carbon atoms, NH.sub.2, NHR.sub.2 or NR.sub.2 R.sub.2 and Z is a cycloalkyl, cycloalkenyl or cycloalkdienyl group substituted with from 0 to 5 alkyl groups, a keto group or a hydroxyl group or a phenyl group substituted with from 0 to 4 hydroxy, alkoxy, alkyl or trifluoromethyl groups or halogen atoms or combinations thereof and the pharmaceutically-acceptable salts thereof.The foregoing compounds have been found to be effective in the treatment of psoriasis, inflammatory conditions and allergic responses.
    Type: Grant
    Filed: July 8, 1983
    Date of Patent: March 19, 1985
    Assignee: USV Pharmaceutical Corporation
    Inventors: Bernard Loev, Wan-Kit Chan, Howard Jones
  • Patent number: 4482544
    Abstract: Compounds of the general formula ##STR1## and their pharmaceutically-acceptable salts, wherein the substituents are as defined herein, having antihypertensive activity.
    Type: Grant
    Filed: November 29, 1982
    Date of Patent: November 13, 1984
    Assignee: USV Pharmaceutical Corporation
    Inventors: Fu-chih Huang, Howard Jones, Wan-Kit Chan
  • Patent number: 4472430
    Abstract: Polyolefinic compounds, useful in the treatment of psoriasis, are disclosed. The compounds are represented by the general formula ##STR1## in which R and R.sub.1 are each hydrogen or an alkyl group of from 1 to 5 carbon atoms; R.sub.2 is an alkyl group of from 1 to 5 carbon atoms; R.sub.3 is hydroxyl, alkoxy of from 1 to 5 carbon atoms, NH.sub.2,NHR.sub.2 or NR.sub.2 R.sub.2 and Z is a cycloalkyl, cycloalkenyl or cycloalkdienyl group substituted with from 0 to 5 alkyl groups, a keto group or a hydroxyl group or a phenyl group substituted with from 0 to 4 hydroxy, alkoxy, alkyl or trifluoromethyl groups or halogen atoms or combinations thereof and the pharmaceutically-acceptable salts thereof.The foregoing compounds have been found to be effective in the treatment of psoriasis.
    Type: Grant
    Filed: June 28, 1982
    Date of Patent: September 18, 1984
    Assignee: USV Pharmaceutical Corporation
    Inventors: Bernard Loev, Wan-kit Chan, Howard Jones
  • Patent number: 4465679
    Abstract: Compounds of the formula ##STR1## and their pharmaceutically-acceptable salts, wherein the substituents are as defined herein, having antihypertensive activity.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: August 14, 1984
    Assignee: USV Pharmaceutical Corporation
    Inventors: Fu-chih Huang, Howard Jones, Wan-Kit Chan