Patents by Inventor Sie-Yearl Chai

Sie-Yearl Chai 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: 6448255
    Abstract: Antiatherosclerotic compounds are provided which have the following structure: wherein: R is hydrogen, lower alkyl, alkenyl, alkynyl, aryl, heteroaryl, or aryl or heteroaryl substituted with one or more members of the group consisting of alkyl, hydroxy, alkoxy, perfluoroalkyl, perfluoroalkoxy, alkylthio, nitro, amino, mono or di-alkylamino, and halogen; D is C—H, carbon bound to R5 or nitrogen; R1, R2, R3, and R4 are each independently hydrogen, alkyl, or taken together form a ring; R5 is one or more groups selected from hydrogen, alkyl, alkenyl, alkynyl, aryl, hydroxy, alkoxy, perfluoroalkyl, perfluoroalkoxy, alkylthio, nitro, amino, mono or di-alkylamino, or halogen; n is an integer of 0-3; or pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: September 10, 2002
    Assignee: Wyeth
    Inventors: Hassan M. Elokdah, Theodore S. Sulkowski, Sie-Yearl Chai, John Babiak
  • Patent number: 6444694
    Abstract: Disclosed herein are compounds of the formula: wherein R is phenyl or substituted phenyl; or R is furyl, pyridyl or quinolinyl; R1 and R2 are hydrogen, halogen, alkyl, alkoxy, nitro, carboxyl, alkoxy-carbonyl or aryloxycarbonyl; R3 is hydrogen, alkyl, aryl or arylalkyl; R4 and R5 are hydrogen or alkyl; or a pharmaceutically acceptable salt thereof, which are useful as inhibitors of smooth muscle cell proliferation.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: September 3, 2002
    Assignee: Wyeth
    Inventors: Sie-Yearl Chai, Hassan M. Elokdah, Theodore S. Sulkowski
  • Publication number: 20020061900
    Abstract: Antiatherosclerotic compounds are provided which have the following structure: 1
    Type: Application
    Filed: September 28, 2001
    Publication date: May 23, 2002
    Applicant: American Home Products Corporation
    Inventors: Hassan M. Elokdah, Theodore S. Sulkowski, Sie-Yearl Chai, John Babiak
  • Patent number: 6288100
    Abstract: Disclosed herein are compounds of formula I or II: wherein R is alkyl phenyl or substituted phenyl; R2 is hydrogen, halogen, alkoxy or alkyl; R1 is hydrogen, alkyl, aryl, arylalkyl, or substituted benzyl; or a pharmaceutically acceptable salt thereof, which are useful as inhibitors of smooth muscle cell proliferation.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: September 11, 2001
    Assignee: American Home Products Corporation
    Inventors: Hassan M. Elokdah, Sie-Yearl Chai, Theodore S. Sulkowski
  • Patent number: 5861517
    Abstract: The compound of formula I: ##STR1## in which R.sup.1 is alkyl or alkenyl; R.sup.2 is alkyl and R.sup.3 and R.sup.4 are, independently, hydrogen or alkyl; or R.sup.2 is hydrogen and R.sup.3 and R.sup.4 taken together are ortho substituted trimethylene or tetramethylene are useful for increasing blood serum HDL levels.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: January 19, 1999
    Assignee: American Home Products Corporation
    Inventors: Hassan M. Elokdah, Sie-Yearl Chai, Theodore S. Sulkowski, Donald P. Strike
  • Patent number: 5821372
    Abstract: The compound of formula I ##STR1## in which R.sup.1 is alkyl, alkenyl, aryl or arylalkyl; R.sup.2 is alkyl, R.sup.3 is a halogen and R.sup.4 is hydrogen; or R.sup.2 is hydrogen, R.sup.3 is a halogen, and R.sup.4 is alkyl are useful for increasing blood serum HDL levels.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: October 13, 1998
    Assignee: American Home Products Corporation
    Inventors: Hassan M. Elokdah, Sie-Yearl Chai, Theodore S. Sulkowski, Donald P. Strike
  • Patent number: 5807864
    Abstract: This invention relates to the use of 2-thioxotetrahydropyrimidin-4-one derivatives to increase HDL cholesterol concentration and as therapeutic compositions for treating atherosclerotic conditions such as dyslipoproteinemias and coronary heart disease. The compounds of this invention are represented by the formula: ##STR1## wherein: R is C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl, or C.sub.2 -C.sub.6 alkynyl; andR.sup.1, R.sup.2, and R.sup.3 are independently hydrogen, halogen or lower alkyl.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: September 15, 1998
    Assignee: American Home Products Corporation
    Inventors: Sie-Yearl Chai, Hassan M. Elokdah, Theodore S. Sulkowski
  • Patent number: 5783707
    Abstract: The compound of formula I ##STR1## in which R.sup.1 is alkyl; and R is alkyl, naphthyl, benzhydryl, fluorophenylmethyl, phenethyl, 1-(fluorophenyl)ethyl, 5-chloro-2-methoxyphenyl, trifluoromethoxyphenyl, trifluoromethylphenyl, methylsulfanylphenyl or pyridyl are useful for increasing blood serum HDL levels.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: July 21, 1998
    Assignee: American Home Products Corporation
    Inventors: Hassan M. Elokdah, Sie-Yearl Chai, Theodore S. Sulkowski, Donald P. Strike
  • Patent number: 5763473
    Abstract: The use of compounds of the formula: ##STR1## where R.sub.1 is alkyl, trifluoromethyl or pyridinyl;R.sub.2 is H, alkyl or substituted arylalkyl, in which the substituents are one or two halogens, carboxyl or alkoxycarbonyl groups;R.sub.3 and R4 are H, alkyl, halogen or nitro;or a pharmaceutically acceptable salt thereof, as inhibitors of smooth muscle cell proliferation.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: June 9, 1998
    Assignee: American Home Procucts Corporation
    Inventors: Hassan M. Elokdah, Sie-Yearl Chai, Theodore S. Sulkowski
  • Patent number: 5710164
    Abstract: Disclosed herein are compounds of the formula: ##STR1## where Ar.sub.1 and Ar.sub.2 are, independently, pyridinyl, quinolinyl, 1,4-benzodioxanyl, dihydro-1,4-benzodioxanyl, pyrrolyl, azaindolyl or carbazolyl, or a pharmaceutically acceptable salt thereof, which are useful as inhibitors of smooth muscle cell proliferation.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: January 20, 1998
    Assignee: American Home Products Corporation
    Inventors: Hassan M. Elokdah, Sie-Yearl Chai, Theodore S. Sulkowski
  • Patent number: 5684030
    Abstract: Disclosed herein are compounds of the formula: ##STR1## where R.sub.1 is substituted phenyl in which the substituents are one or two halogens, alkyl groups, carboxyl groups or alkoxycarbonyl groups;R.sub.2 is H or alkyl;R.sub.3 and R.sub.4 are, independently, H, alkyl, halogen or nitro;and n is 1, 2 or 3;or a pharmaceutically acceptable salt thereof, which are useful as inhibitors of smooth muscle cell proliferation.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 4, 1997
    Assignee: American Home Products Corporation
    Inventors: Hassan M. Elokdah, Sie-Yearl Chai, Theodore S. Sulkowski
  • Patent number: 5663363
    Abstract: The compound of formula I ##STR1## in which R is alkynyl; and X and Y are, independently, alkyl, halo, perfluoralkyl, perfluoralkoxy, or, taken together, X and Y are ortho substituted trimethylene or tetramethylene are useful for increasing blood serum HDL levels.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: September 2, 1997
    Assignee: American Home Products Corporation
    Inventors: Hassan M. Elokdah, Sie-Yearl Chai, Theodore S. Sulkowski, Donald P. Strike
  • Patent number: 5654436
    Abstract: Disclosed herein are compounds of the formula: ##STR1## where R.sub.1 is alkyl, trifluoromethyl or pyridinyl;R.sub.2 is H, alkyl or substituted arylalkyl, in which the substituents are one or two halogens, carboxyl or alkoxycarbonyl groups;R.sub.3 and R.sub.4 are H, alkyl, halogen or nitro;or a pharmaceutically acceptable salt thereof, which are useful as inhibitors of smooth muscle cell proliferation.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 5, 1997
    Assignee: American Home Products Corporation
    Inventors: Hassan M. Elokdah, Sie-Yearl Chai, Theodore S. Sulkowski
  • Patent number: 5554607
    Abstract: A method for increasing the HDL cholesterol concentration in the blood of a mammal in need of increased HDL cholesterol blood concentration, which comprises administering to said mammal, orally or parenterally, a compound of formula I: ##STR1## wherein R is alkyl; a substituted or unsubstituted aromatic N, O or S heterocycle; substituted or unsubstituted aryl, arylalkyl, benzhydryl or indanyl, in which the substituents are one to three members independently selected from the group consisting of alkyl, alkoxy, alkylthio, alkenyl, alkynyl, halo, perfluoroalkyl, perfluoroalkyl or hydroxy; and R.sup.1 is aryl, alkyl, alkenyl, alkynyl or substituted aryl where the substituents are one to three members independently selected from the group consisting of alkyl, alkoxy, alkylthio, alkenyl, alkynyl, halo, perfluoroalkyl, perfluoroalkoxy or hydroxy.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: September 10, 1996
    Assignee: American Home Products Corporation
    Inventors: Hassan M. Elokdah, Sie-Yearl Chai, Theodore S. Sulkowski, Donald P. Strike
  • Patent number: 4889936
    Abstract: The invention concerns a process for preparng a thiazolo[3,2-a]benzimidazole of formula I ##STR1## in which formula n is 1 or 2, and R.sub.1 is hydrogen, lower alkyl, lower alkoxy, trifluoromethyl or halo, or a salt thereof which comprises dehydrating a compound of formula II, ##STR2## or a salt thereof wherein n and R, are a defined above, and COOR is an acid or ester function in the presence of an acid selected from sulphuric, sulphonic and phosphoric acid or mixtures thereof and if desired or required an inert solvent provided that if water is present then the amount of water is less than about 15% by volume of the acid, the reaction being carried out with heating if necessary.
    Type: Grant
    Filed: January 10, 1989
    Date of Patent: December 26, 1989
    Assignee: John Wyeth & Brotyher Limited
    Inventors: Robin G. Shepherd, Sie-Yearl Chai, Maynard E. Lichty, Arnold S. Milowsky
  • Patent number: 4812574
    Abstract: The invention concerns a process for preparing a thiazolo[3,2-a]benzimidazole of formula I ##STR1## in which formula n is 1 or 2, and R.sub.1 is hydrogen, lower alkyl, lower alkoxy, trifluoromethyl or halo, or a salt thereof which comprises dehydrating a compound of formula II, ##STR2## or a salt thereof wherein n and R, are as defined above, and COOR is an acid or ester function in the presence of an acid selected from sulphuric, sulphonic and phosphoric acid or mixtures thereof and if desired or required an inert solvent provided that if water is present then the amount of water is less than about 15% by volume of the acid, the reaction being carried out with heating if necessary.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: March 14, 1989
    Assignees: John Wyeth & Brother Ltd., American Home Products Corporation
    Inventors: Robin G. Shepherd, Sie-Yearl Chai, Maynard E. Lichty, Arnold S. Milowsky
  • Patent number: 4055553
    Abstract: The growth hormone release inhibiting compound: ##STR1## in which R is hydroxyl, dimethylamino, alkylamino of 1-5 carbon atoms or phenethylamine, the protamine zinc, protamine aluminum and non-toxic acid addition salts thereof as well as the corresponding linear heptadecapeptide and intermediates therefore are herein described.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: October 25, 1977
    Assignee: American Home Products Corporation
    Inventors: Sie-Yearl Chai, John P. Yardley