Patents by Inventor Tai Wah Chan

Tai Wah 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).

  • Publication number: 20160214976
    Abstract: Amorphous and polymorphic of palonosetron hydrochloride are disclosed that can be characterized by X-ray powder diffraction patterns, thermal properties, purity and methods of manufacture. These forms of palonosetron hydrochloride can be produced from solution or by solid state interconversions. The forms can be used in pharmaceutical formulations: particularly preferred uses of these formulations are in prevention and treatment of nausea and emesis arising from chemotherapy or postoperative side effects. The forms can optionally be used as mixtures of the crystalline and/or amorphous forms.
    Type: Application
    Filed: January 25, 2016
    Publication date: July 28, 2016
    Applicant: Helsinn Healthcare SA
    Inventors: Waldo Mossi, Giorgio Calderari, Wilma Tamraz, Tai Wah Chan
  • Publication number: 20150291581
    Abstract: Amorphous and polymorphic of palonosetron hydrochloride are disclosed that can be characterized by X-ray powder diffraction patterns, thermal properties, purity and methods of manufacture. These forms of palonosetron hydrochloride can be produced from solution or by solid state interconversions. The forms can be used in pharmaceutical formulations: particularly preferred uses of these formulations are in prevention and treatment of nausea and emesis arising from chemotherapy or postoperative side effects. The forms can optionally be used as mixtures of the crystalline and/or amorphous forms.
    Type: Application
    Filed: April 15, 2015
    Publication date: October 15, 2015
    Applicant: HELSINN HEALTHCARE SA
    Inventors: Waldo MOSSI, Giorgio CALDERARI, Wilma TAMRAZ, Tai Wah CHAN
  • Publication number: 20140171646
    Abstract: Amorphous and polymorphic of palonosetron hydrochloride are disclosed that can be characterized by X-ray powder diffraction patterns, thermal properties, purity and methods of manufacture. These forms of palonosetron hydrochloride can be produced from solution or by solid state interconversions. The forms can be used in pharmaceutical formulations: particularly preferred uses of these formulations are in prevention and treatment of nausea and emesis arising from chemotherapy or postoperative side effects. The forms can optionally be used as mixtures of the crystalline and/or amorphous forms.
    Type: Application
    Filed: October 2, 2013
    Publication date: June 19, 2014
    Applicant: Helsinn Healthcare S.A.
    Inventors: Waldo MOSSI, Giorgio CALDERARI, Wilma TAMRAZ, Tai Wah CHAN
  • Publication number: 20110136847
    Abstract: The present invention provides opioid formulations suitable for long-term delivery to a subject. The formulation of the invention comprises an opioid or opioid derivative (e.g., morphine, hydromorphone, fentanyl or a fentanyl congener), and an aqueous solvent comprising a low molecular weight carboxylic acid (e.g., C2-4, C2-7). The invention thus provides for formulations comprising morphine, hydromorphone, fentanyl or fentanyl congeners in concentrations significantly in excess of conventional aqueous formulations, e.g., on the order about 2-fold to about 10,000-fold greater than conventional formulations, e.g., currently commercially available formulations.
    Type: Application
    Filed: September 17, 2010
    Publication date: June 9, 2011
    Inventors: Tai Wah Chan, Wilma Tamraz, Min Lee
  • Patent number: 7819855
    Abstract: The present invention provides a catheter for use in delivering formulation that allows modification of the formulation prior to or concomitant with its transport or at a delivery site. The catheter comprises an elongate body, which defines an inner lumen extending between the proximal and distal ends, and a modifying element, which provides for modification of one or more components of a formulation prior to or concomitant with release at the delivery site.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: October 26, 2010
    Assignee: Durect Corporation
    Inventors: Tai Wah Chan, Tim Nelson, Jim Brown
  • Publication number: 20100105724
    Abstract: Amorphous and polymorphic of palonosetron hydrochloride are disclosed that can be characterized by X-ray powder diffraction patterns, thermal properties, purity and methods of manufacture. These forms of palonosetron hydrochloride can be produced from solution or by solid state interconversions. The forms can be used in pharmaceutical formulations: particularly preferred uses of these formulations are in prevention and treatment of nausea and emesis arising from chemotherapy or postoperative side effects. The forms can optionally be used as mixtures of the crystalline and/or amorphous forms.
    Type: Application
    Filed: December 4, 2007
    Publication date: April 29, 2010
    Applicant: HELSINN HEALTHCARE SA
    Inventors: Waldo Mossi, Giorgio Calderari, Enrico Braglia, Riccardo Braglia, Wilma Timraz, Tai Wah Chan
  • Patent number: 7250043
    Abstract: The present invention provides a catheter for use in delivering formulation that allows modification of the formulation prior to or concomitant with its transport or at a delivery site. The catheter comprises an elongate body, which defines an inner lumen extending between the proximal and distal ends, and a modifying element, which provides for modification of one or more components of a formulation prior to or concomitant with release at the delivery site.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: July 31, 2007
    Assignee: Durect Corporation
    Inventors: Tai Wah Chan, Tim Nelson, Jim Brown
  • Publication number: 20040115236
    Abstract: Devices and methods for the sustained release into a subject of an inhibitor of mast cell-mediated inflammation, specifically sustained-release of sodium cromoglycate as a prophylactic to prevent acute asthma attacks.
    Type: Application
    Filed: January 23, 2004
    Publication date: June 17, 2004
    Inventors: Tai Wah Chan, Randolph M. Johnson, Andrew R. Miksztal, Arthur J. Tipton, John W. Gibson, Stacey K. Meador
  • Publication number: 20040102476
    Abstract: The present invention provides opioid formulations suitable for long-term delivery to a subject. The formulation of the invention comprises an opioid or opioid derivative (e.g., morphine, hydromorphone, fentanyl or a fentanyl congener), and an aqueous solvent comprising a low molecular weight carboxylic acid (e.g., C2-4, C2-7). The invention thus provides for formulations comprising morphine, hydromorphone, fentanyl or fentanyl congeners in concentrations significantly in excess of conventional aqueous formulations, e.g., on the order about 2-fold to about 10,000-fold greater than conventional formulations, e.g., currently commercially available formulations.
    Type: Application
    Filed: November 25, 2002
    Publication date: May 27, 2004
    Inventors: Tai Wah Chan, Wilma Tamraz, Min Lee
  • Publication number: 20040068251
    Abstract: The present invention provides a catheter for use in delivering formulation that allows modification of the formulation prior to or concomitant with its transport or at a delivery site. The catheter comprises an elongate body, which defines an inner lumen extending between the proximal and distal ends, and a modifying element, which provides for modification of one or more components of a formulation prior to or concomitant with release at the delivery site.
    Type: Application
    Filed: October 7, 2003
    Publication date: April 8, 2004
    Applicant: Durect Corporation
    Inventors: Tai Wah Chan, Tim Nelson, Jim Brown
  • Patent number: 6629969
    Abstract: The present invention provides a catheter for use in delivering formulation that allows modification of the formulation prior to or concomitant with its transport or at a delivery site. The catheter comprises an elongate body, which defines an inner lumen extending between the proximal and distal ends, and a modifying element, which provides for modification of one or more components of a formulation prior to or concomitant with release at the delivery site.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: October 7, 2003
    Assignee: Durect Corporation
    Inventors: Tai Wah Chan, Tim Nelson, Jim Brown
  • Publication number: 20030028174
    Abstract: The present invention provides a catheter for use in delivering formulation that allows modification of the formulation prior to or concomitant with its transport or at a delivery site. The catheter comprises an elongate body, which defines an inner lumen extending between the proximal and distal ends, and a modifying element, which provides for modification of one or more components of a formulation prior to or concomitant with release at the delivery site.
    Type: Application
    Filed: July 26, 2001
    Publication date: February 6, 2003
    Inventors: Tai Wah Chan, Tim Nelson, Jim Brown
  • Publication number: 20020151876
    Abstract: The invention features devices and methods for the delivery of a formulation to an individual to stabilize or increase bone mass by increasing bone deposition and/or decreasing bone resorption. In the present invention, a drug formulation comprising a bisphosphonate is provided parenterally in a sustained release dosage form, e.g., as an injected matrix or stored within a drug delivery device. In a specific embodiment, the dosage form may be implanted or injected into a site in the body (i.e., implantation site) and a conduit, e.g. a catheter, can be used to transport the formulation from the dosage form for release at a site in the body distal from the implantation site.
    Type: Application
    Filed: February 7, 2002
    Publication date: October 17, 2002
    Inventor: Tai-Wah Chan