Patents by Inventor Ka Chun A. Chan

Ka Chun A. 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).

  • Granular material for dosage forms
    Patent number: 9655851
    Abstract: A granular material which has a mean particle diameter of 150 to 800 micrometers; and an unsettled bulk density of 0.1 to 0.35 g/cm3 and/or a compactibility which results in a compact with a tensile strength of at least 1.7 MPa when the granular material is subjected to a compaction pressure of 266 MPa; and wherein the main component of the granular material is a cellulose derivative or an alkylene oxide homo- or copolymer or a blend thereof is useful for preparing dosage forms with a controlled release profile.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: May 23, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: Tim D. Cabelka, Akshay Bellare, Ka Chun A. Chan, Tina P. Dasbach, Kacee B. Ender, Karl V. Jacob, Robert E. Scheid, Jr.
  • Sustained release dosage form
    Patent number: 8956654
    Abstract: An osmotic dosage form which comprising: (a) a core comprising a biologically active ingredient; (b) a semi-permeable membrane covering said core; and (c) at least one passageway through the semi-permeable membrane, wherein the semi-permeable membrane comprises ethyl cellulose, an acrylic or methacrylic polymer and a water-soluble plasticizer with the proviso that the semi-permeable membrane comprises no or not more than 15 weight percent of a water-soluble material excluding any water-soluble plasticizer, based on the total dry weight of the semi-permeable membrane.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: February 17, 2015
    Assignee: Dow Global Technologies LLC
    Inventors: Yong Gan, Chunliu Zhu, Sophie Zhai, Robert I. Schmitt, Ka Chun A. Chan
  • Granular material for dosage forms
    Patent number: 8877249
    Abstract: A dosage form for controlled release is produced from a composition comprising a granular material having a mean particle diameter of 150 to 350 micrometers and a compactibility resulting in a compact with a tensile strength of at least 1.7 MPa when the granular material is subjected to a compaction pressure of 266 MPa, at least 80 percent of the granular material being a water-soluble cellulose ether, water-soluble cellulose ester, an alkylene oxide homo- or copolymer, or a blend thereof; and an active ingredient.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: November 4, 2014
    Assignee: Dow Global Technologies LLC
    Inventors: Tim D. Cabelka, Akshay Bellare, Ka Chun A. Chan, Tina P. Dasbach, Kacee B. Ender, Karl V. Jacob, Robert E. Scheid, Jr.
  • GRANULAR MATERIAL FOR DOSAGE FORMS
    Publication number: 20140308356
    Abstract: A granular material which has a mean particle diameter of 150 to 800 micrometers; and an unsettled bulk density of 0.1 to 0.35 g/cm3 and/or a compactibility which results in a compact with a tensile strength of at least 1.7 MPa when the granular material is subjected to a compaction pressure of 266 MPa; and wherein the main component of the granular material is a cellulose derivative or an alkylene oxide homo- or copolymer or a blend thereof is useful for preparing dosage forms with a controlled release profile.
    Type: Application
    Filed: June 27, 2014
    Publication date: October 16, 2014
    Applicants: THE DOW CHEMICAL COMPANY, DCOMCO, INC.
    Inventors: Tim D. Cabelka, Akshay Bellare, Ka Chun A. Chan, Tina P. Dasbach, Kacee B. Ender, Karl V. Jacob, Robert E. Scheid, JR.
  • SUSTAINED RELEASE DOSAGE FORM
    Publication number: 20120045485
    Abstract: An osmotic dosage form which comprising: (a) a core comprising a biologically active ingredient; (b) a semi-permeable membrane covering said core; and (c) at least one passageway through the semi-permeable membrane, wherein the semi-permeable membrane comprises ethyl cellulose, an acrylic or methacrylic polymer and a water-soluble plasticizer with the proviso that the semi-permeable membrane comprises no or not more than 15 weight percent of a water-soluble material excluding any water-soluble plasticizer, based on the total dry weight of the semi-permeable membrane.
    Type: Application
    Filed: June 2, 2009
    Publication date: February 23, 2012
    Applicant: Dow Global Technologies Inc.
    Inventors: Yong Gan, Chunliu Zhu, Sophie Zhai, Robert I. Schmitt, Ka Chun A. Chan
  • GRANULAR MATERIAL FOR DOSAGE FORMS
    Publication number: 20100151038
    Abstract: A granular material which has a mean particle diameter of 150 to 800 micrometers; and an unsettled bulk density of 0.1 to 0.35 g/cm3 and/or a compactibility which results in a compact with a tensile strength of at least 1.7 MPa when the granular material is subjected to a compaction pressure of 266 MPa; and wherein the main component of the granular material is a cellulose derivative or an alkylene oxide homo- or copolymer or a blend thereof is useful for preparing dosage forms with a controlled release profile.
    Type: Application
    Filed: February 28, 2008
    Publication date: June 17, 2010
    Inventors: Tim D . Cabelka, Akshay Bellare, Ka Chun A. Chan, Tina P. Dasbach, Kacee B. Ender, Karl V. Jacob, Robert E. Scheid, JR.