Patents by Inventor Steve Jan

Steve Jan 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).

  • Controlled release oral tablet having a unitary core
    Patent number: 6495162
    Abstract: A controlled release antihyperglycemic tablet that does not contain an expanding polymer and comprising a core containing the antihyperglycemic drug, a semipermeable membrane coating the core and at least one passageway in the membrane.
    Type: Grant
    Filed: November 1, 2001
    Date of Patent: December 17, 2002
    Assignee: Andrx Pharmaceuticals, Inc.
    Inventors: Xiu Xiu Cheng, Chih-Ming Chen, Steve Jan, Joseph Chou
  • Controlled release oral tablet having a unitary core
    Publication number: 20020064556
    Abstract: A controlled release antihyperglycemic tablet that does not contain an expanding polymer and comprising a core containing the antihyperglycemic drug, a semipermeable membrane coating the core and at least one passageway in the membrane.
    Type: Application
    Filed: November 1, 2001
    Publication date: May 30, 2002
    Inventors: Xiu Xiu Cheng, Chih-Ming Chen, Steve Jan, Joseph Chou
  • Controlled release metformin formulations
    Publication number: 20010024659
    Abstract: Sustained release pharmaceutical formulations comprising an antihyperglycemic drug or a pharmaceutically acceptable salt thereof are disclosed. The formulations provide therapeutic plasma levels of the antihyperglycemic drug to a human patient over a 24 hour period after administration.
    Type: Application
    Filed: November 29, 2000
    Publication date: September 27, 2001
    Applicant: Andrx Corporation
    Inventors: Chih-Ming Chen, Xiu Xiu Cheng, Steve Jan, Joseph Chou
  • Controlled release tablet having a unitary core
    Patent number: 6284275
    Abstract: A controlled release pharmaceutical tablet containing antihyperglycemic drug and a hypoglycemic drug that does not contain an expanding or gelling polymer layer and comprising a core containing the antihyperglycemic drug and the hypoglycemic drug, a semipermeable coating membrane surrounding the core and at least one passageway in the membrane to allow the drugs to be released from the core.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: September 4, 2001
    Assignee: Andrx Pharmaceuticals, Inc.
    Inventors: Chih-Ming Chen, Xiu Xiu Cheng, Joseph Chou, Steve Jan
  • DILTIAZEM CONTROLLED RELEASE FORMULATION AND METHOD OF MANUFACTURE
    Publication number: 20010007681
    Abstract: A controlled release diltiazem dosage formulation comprising a plurality of active pellets coated with an extended release coating wherein the active pellets contain diltiazem or a pharmaceutically acceptable salt, a pharmaceutically acceptable inert seed and a binder and the extended release coating contains a water insoluble water permeable polymer, a channeling agent, a lubricant and optionally a surfactant. A single batch intermittent method of manufacturing a heterogeneous population of extended release pellets for use as a dosage formulation is also disclosed.
    Type: Application
    Filed: July 20, 1998
    Publication date: July 12, 2001
    Inventors: CHIH-MING CHEN, XIU XIU CHENG, STEVE JAN
  • Controlled release oral dosage form of ketoprofen
    Patent number: 6238703
    Abstract: A controlled release analgesic dosage form comprising: a core comprising an analgesic and binding agent; and a coating comprising an enteric polymer, a water insoluble second polymer and a lubricant.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: May 29, 2001
    Assignee: Andrx Pharmaceuticals, Inc.
    Inventors: Steve Jan, Xiu Xiu Cheng, Chih-Ming Chen
  • Granule modulating hydrogel system
    Publication number: 20010001658
    Abstract: A naproxen once-a-day matrix tablet is described which is based on a compressed mixture of a controlled release component of said tablet that contains:
    Type: Application
    Filed: January 21, 2000
    Publication date: May 24, 2001
    Inventors: Chih-Ming Chen, Steve Jan, Jianbo Xie
  • Controlled release bupropion formulation
    Patent number: 6210716
    Abstract: A controlled release dosage form of bupropion hydrochloride which comprises: (a) a first pellet having a core of bupropion hydrochloride and hydroxypropyl methylcellulose at a weight ratio of 10:1 to 30:1 and a coating of a mixture of an acrylic resin which is soluble in acidic media and ethyl cellulose; (b) a second pellet having a core of bupropion hydrochloride and hydroxypropyl methylcellulose at a ratio of 10:1 to 30:1; an inner coating of a mixture of an acrylic resin which is soluble in acidic media and a water insoluble polymer and an outer coating which comprises an enteric coating polymer.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: April 3, 2001
    Assignee: Andrx Pharmaceuticals, Inc.
    Inventors: Chih-Ming Chen, Jianbo Xie, Steve Jan
  • Oral dosage for the controlled release of analgesic
    Patent number: 6197347
    Abstract: An oral dosage form that provides for the controlled release of an analgesic wherein the dosage form comprises a core containing an analgesic that is coated with a mixture of an enteric polymer, a water insoluble polymer and a lubricant.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: March 6, 2001
    Assignee: Andrx Pharmaceuticals, Inc.
    Inventors: Steve Jan, Xiu Xiu Cheng, Chih-Ming Chen
  • Controlled release oral tablet having a unitary core
    Patent number: 6099859
    Abstract: A controlled release antihyperglycemic tablet that does not contain an expanding polymer and comprising a core containing the antihyperglycemic drug, a semipermeable membrane coating the core and at least one passageway in the membrane.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: August 8, 2000
    Assignee: Andrx Pharmaceuticals, Inc.
    Inventors: Xiu Xiu Cheng, Chih-Ming Chen, Steve Jan, Joseph Chou
  • Oral dosage form for the controlled release of a biguanide and sulfonylurea
    Patent number: 6099862
    Abstract: A controlled release pharmaceutical tablet containing antihyperglycemic drug and a hypoglycemic drug that does not contain an expanding or gelling polymer layer and comprising a core containing the antihyperglycemic drug and the hypoglycemic drug, a semipermeable coating membrane surrounding the core and at least one passageway in the membrane to allow the drugs to be released from the core.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: August 8, 2000
    Assignee: ANDRX Corporation
    Inventors: Chih-Ming Chen, Xiu Xiu Cheng, Joseph Chou, Steve Jan