Patents Assigned to QLT, Inc.
  • Patent number: 8158669
    Abstract: The present invention describes an improved photodynamic treatment to treat subfoveal choroidal neovascularization (CNV).
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: April 17, 2012
    Assignee: QLT, Inc.
    Inventor: Romulus K Brazzell
  • Publication number: 20110257266
    Abstract: Disclosed herein are therapeutic regimens for treating or ameliorating a visual disorder associate with an endogenous retinoid deficiency in a subject by administering a therapeutically effective amount of a synthetic retinal derivative or a pharmaceutically acceptable composition comprising a synthetic retinal derivative according to the therapeutic regimen which leads to local recovery of visual functions such as visual fields, visual acuity and retinal sensitivity, among others.
    Type: Application
    Filed: April 19, 2011
    Publication date: October 20, 2011
    Applicant: QLT, INC.
    Inventors: H. Andrew Strong, Suzanne Cadden
  • Patent number: 7850981
    Abstract: Immuno-adjuvant photodynamic therapy to treat and prevent metastatic cancer is effected using photosensitizers in combination with immuno-adjuvants to destroy metastatic tumor cells.
    Type: Grant
    Filed: November 9, 2004
    Date of Patent: December 14, 2010
    Assignees: QLT, Inc., University of British Columbia (UBC)
    Inventors: Patrick Mark Curry, Anna M. Richter, Julia G. Levy, David W. C. Hunt
  • Patent number: 7264629
    Abstract: Photodynamic therapy (PDT) is used to stimulate and/or restore hair growth in areas of hair loss. Methods and compositions relating to PDT treatment for alopecia are disclosed. In light of PDT use to remove unwanted hair by inactivating or destroying hair follicles or destroying the tissue feeding the hair follicles, such methods and compositions relate to a surprising and unexpected discovery. PDT permits a means to treat conditions relating to hair loss such as androgenic alopecia, alopecia areata and drug-induced alopecia.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: September 4, 2007
    Assignee: QLT, Inc.
    Inventors: Guillermo O. Simkin, Anna M. Richter, David W. C. Hunt, John Robert North, Peter Lutwyche, Ronald Erwin Boch, Jean-Marie Houle
  • Publication number: 20070060551
    Abstract: Methods of using substituted 3,5-dithio-, disulfinyl-or disulfonyl-isothiazole derivatives to treat cancer or inflammation in a mammal and pharmaceutical compositions containing such derivatives are disclosed.
    Type: Application
    Filed: June 11, 2003
    Publication date: March 15, 2007
    Applicant: QLT, Inc.
    Inventors: Zaihui Zhang, Timothy Daynard, Gabriel Kalmar
  • Patent number: 7135193
    Abstract: Liposomal pharmaceutical formulations incorporating porphyrin photosensitizers useful for photodynamic therapy or diagnosis of malignant cells. The liposomal formulations comprise a porphyrin photosensitizer, particularly the hydro-mono benzoporphyrins (BPD) having light absorption maxima in the range of 670–780 nanometers, a disaccharide or polysaccharide and one or more phospholipids.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: November 14, 2006
    Assignee: QLT, Inc.
    Inventors: Narendra R. Desai, Bushra J. Agha, Kalidas Madhavrao Kale, James R. Lawter
  • Patent number: 7122568
    Abstract: The present invention relates to the use of low-dose photodynamic therapy (PDT) to prevent, treat, inhibit or reduce restenosis in blood vessels. The present invention may be used in combination with any angioplastic procedure to prevent restenosis or to decrease the intima thickness, and thus luminal narrowing.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: October 17, 2006
    Assignee: QLT, Inc.
    Inventors: Beth Anne Allison, Philippe Maria Clotaire Margaron, Valery Rubinchik, Russell G. Hodge, Michael David Leslie Stonefield
  • Patent number: 7060695
    Abstract: An improved method to treat conditions of the eye characterized by ocular neovascularization is provided in which patients are given and initial photodynamic therapy (PDT) treatment to destroy the neovasculature, and then are re-evaluated at least twice during the following 6 months, and retreated as necessary. Preferably, three retreatments are provided.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: June 13, 2006
    Assignees: QLT, Inc., Novartis AG
    Inventors: H. Andrew Strong, Mohammad Azab, Troy Albert Reaves, Jr.
  • Patent number: 7015240
    Abstract: The invention relates to the use of photodynamic therapy (PDT) to treat macular edemas, including DME, CRVO and BRVO. It provides an alternative to photocoagulation and the disadvantages associated therewith.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: March 21, 2006
    Assignee: QLT, Inc.
    Inventors: Janice North, Peter Hnik, H. Andrew Strong
  • Patent number: 6984395
    Abstract: Compositions comprising microaggregates containing hydrophobic drugs, as well as methods for their production, are described. Such microaggregates may include micelle structures or combinations thereof with liposomes, and constitute an effective delivery vehicle for a hydrophobic agent. Methods for microaggregate production include the use of preferred lipid compounds and processing conditions favoring the production of small aggregates for improved filter sterilization.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: January 10, 2006
    Assignee: QLT, Inc.
    Inventors: Ronald Erwin Boch, Dev Mitra Ranji Singh, Iman Karmadi
  • Patent number: 6890555
    Abstract: Liposomal pharmaceutical formulations incorporating porphyrin photosensitizers useful for photodynamic therapy or diagnosis of malignant cells. The liposomal formulations comprise a porphyrin photosensitizer, particularly the hydro-mono benzoporphyrine (BPD) having light absorption maxima in the range of 670-780 nanometers, a disaccharide or polysaccharide and one or more phospholipids.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: May 10, 2005
    Assignee: QLT, Inc.
    Inventors: Narendra Raghunathji Desai, Bushra J. Agha, Kalidas Madhavrao Kale, James R. Lawter
  • Patent number: 6849058
    Abstract: Multiple sclerosis and rheumatoid arthritis can be treated effectively using photodynamic therapy. In this protocol, a photoactive compound is administered, allowed to distribute in the effected subject, and the subject is then irradiated to activate the photoactive compound. Alternatively, the blood of a subject to be treated can be subjected to PDT extracorporeally. In the case of rheumatoid arthritis, localized treatment at the joints may also be employed.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: February 1, 2005
    Assignee: QLT, Inc.
    Inventors: Julia G. Levy, Janice North
  • Patent number: 6248734
    Abstract: Photodynamic therapy to prevent secondary cataracts is effected using photosensitizers such as green porphyrins as photoactive agents to destroy remnant lens epithelial cells.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: June 19, 2001
    Assignees: QLT, Inc., The University of British Columbia, Ciba Vision Opthalmics
    Inventors: Howard E. Meadows, Danielle Wenkstern, David R. Mallek, Marcello Nick Bussanich, Anna M. Richter, Julia G. Levy, Claude A. A. Hariton, Gustav Huber, Jack Rootman
  • Patent number: 6235767
    Abstract: A method to prevent or inhibit the development of arterial plaque, comprising the steps of: a. administering to a subject an amount of a green porphyrin compound effective to prevent or inhibit said development; and b. allowing the inhibition to occur in the absence of irradiation with light absorbed by the green porphyrin, or a pharmaceutical composition for preventing or inhibiting the development of arterial plaque. The composition comprises: a. an amount of a green porphyrin compound effective to prevent or inhibit the development when administered to a subject in need of such treatment, even in the absence of irradiation with light absorbed by said the green porphyrin; and b. a pharmaceutically acceptable excipient. The administration of the green porphyrin need not be accompanied by any purposeful irradiation with light.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: May 22, 2001
    Assignee: QLT, Inc.
    Inventors: Barbara Kelly, Julia Levy, Philippe Maria Clotaire Margaron
  • Patent number: 6117862
    Abstract: The invention provides a method to inhibit the formation of neovasculature while maintaining viability of the underlying tissue by subjecting a subject in which angiogenesis is to be inhibited to sublethal photodynamic therapy. The invention also provides a model for assessing sublethal PDT protocols to inhibit angiogenesis in particular target tissues.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: September 12, 2000
    Assignee: QLT, Inc.
    Inventors: Philippe Maria Clotaire Margaron, Simon Leong, Julia G. Levy, Anna M. Richter