Patents by Inventor Tarlochan S. Purewal

Tarlochan S. Purewal 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).

  • CRC-free medicinal aerosol formulations of 1,1,1,2-tetrafluoroethane (134A) with polar adjuvant
    Patent number: 6352684
    Abstract: A medicinal aerosol formulation including 0.01-5% medicament, at least 50% by weight 1,1,1,2-tetrafluoroethane (134a), less than 5% surface active agent, and at least one compound having higher polarity than 1,1,1,2-tetrafluoroethane, and which is free of chlorofluorocarbons and propellants CHClF2, CH2F2 and CF3CH3.
    Type: Grant
    Filed: April 28, 1998
    Date of Patent: March 5, 2002
    Assignee: Riker Laboratories Inc.
    Inventors: Tarlochan S. Purewal, David J. Greenleaf
  • Medicinal aerosol formulations
    Patent number: 5776434
    Abstract: A self-propelling aerosol formulation which may be free from CFC's which comprises a medicament, 1,1,1,2-tetrafluoroethane, a surface active agent and at least one compound having a higher polarity than 1,1,1,2-tetrafluoroethane.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: July 7, 1998
    Assignee: Riker Laboratories, Inc.
    Inventors: Tarlochan S. Purewal, David J. Greenleaf
  • Medicinal aerosol formulations
    Patent number: 5766573
    Abstract: A self-propelling aerosol formulation which may be free from CFC's which comprises a medicament, 1,1,1,2-tetrafluoroethane, a surface active agent and at least one compound having a higher polarity than 1,1,1,2-tetrafluoroethane.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: June 16, 1998
    Assignee: Riker Laboratories, Inc.
    Inventors: Tarlochan S. Purewal, David J. Greenleaf
  • Medicinal aerosol formulations
    Patent number: 5720940
    Abstract: A self-propelling aerosol formulation which may be free from CFC's which comprises a medicament, 1,1,1,2-tetrafluoroethane, a surface active agent and at least one compound having a higher polarity than 1,1,1,2-tetrafluoroethane.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: February 24, 1998
    Assignee: Riker Laboratories, Inc.
    Inventors: Tarlochan S. Purewal, David J. Greenleaf
  • Medicinal aerosol formulations
    Patent number: 5695743
    Abstract: A self-propelling aerosol formulation which may be free from CFC's which comprises a medicament, 1,1,1,2-tetrafluoroethane, a surface active agent and at least one compound having a higher polarity than 1,1,1,2-tetrafluoroethane.
    Type: Grant
    Filed: March 4, 1993
    Date of Patent: December 9, 1997
    Assignee: Riker Laboratories, Inc.
    Inventors: Tarlochan S. Purewal, David J. Greenleaf
  • Medicinal aerosol formulations
    Patent number: 5683677
    Abstract: A self-propelling aerosol formulation which may be free from CFC's which comprises a medicament, 1,1,1,2-tetrafluoroethane, a surface active agent and at least one compound having a higher polarity than 1,1,1,2-tetrafluoroethane.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: November 4, 1997
    Assignee: Riker Laboratories, Inc.
    Inventors: Tarlochan S. Purewal, David J. Greenleaf
  • Medicinal aerosol formulations
    Patent number: 5681545
    Abstract: A self-propelling aerosol formulation which may be free from CFC's comprises a medicament, 1,1,1,2-tetrafluoroethane, a surface active agent and at least one compound having a higher polarity than 1,1,1,2-tetrafluoroethane.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: October 28, 1997
    Assignee: Riker Laboratories, Inc.
    Inventors: Tarlochan S. Purewal, David J. Greenleaf
  • Medicinal aerosol formulations
    Patent number: 5674473
    Abstract: A self-propelling aerosol formulation which may be free from CFC's which comprises a medicament, 1,1,1,2-tetrafluoroethane, a surface active agent and at least one compound having a higher polarity than 1,1,1,2-tetrafluoroethane.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: October 7, 1997
    Assignee: Riker Laboratories, Inc.
    Inventors: Tarlochan S. Purewal, David J. Greenleaf
  • Medicinal aerosol formulations
    Patent number: 5605674
    Abstract: A self-propelling aerosol formulation which may be free from CFC's which comprises a medicament, 1,1,1,2-tetrafluoroethane, a surface active agent and at least one compound having a higher polarity than 1,1,1,2-tetrafluoroethane.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: February 25, 1997
    Assignee: Riker Laboratories, Inc.
    Inventors: Tarlochan S. Purewal, David J. Greenleaf
  • Medicinal aerosol formulations
    Patent number: 5439670
    Abstract: A self-propelling aerosol formulation which may be free from CFC's which comprises a medicament, 1,1,1,2-tetrafluoroethane, a surface active agent and at least one compound having a higher polarity than 1,1,1,2-tetrafluoroethane.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: August 8, 1995
    Assignee: Riker Laboratories, Inc.
    Inventors: Tarlochan S. Purewal, David J. Greenleaf
  • Method for preparing medicinal aerosol formulation containing coated medicament
    Patent number: 5348730
    Abstract: A method for preparing a self-propelling, powder dispersing aerosol composition comprising at least 0.0001% by weight of a finely-divided solid medicament coated with a non-perfluorinated surface active dispersing agent which constitutes at least 0.0001% by weight of the coated solid material, and suspended in an aerosol propellant in which the non-perfluorinated surface-active dispersing agent is substantially insoluble. Propellant-insoluble non-perfluorinated surfactants are used to prepare stable dispersions of powdered medicament by way of pre-coating the medicament with the surfactant prior to admixture with propellant.
    Type: Grant
    Filed: March 17, 1993
    Date of Patent: September 20, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: David J. Greenleaf, Tarlochan S. Purewal, Philip A. Jinks
  • Medicinal aerosol formulations
    Patent number: 5225183
    Abstract: A self-propelling aerosol formulation which may be free from CFC's which comprises a medicament, 1,1,1,2-tetrafluoroethane, a surface active agent and at least one compound having a higher polarity than 1,1,1,2-tetrafluoroethane.
    Type: Grant
    Filed: January 30, 1991
    Date of Patent: July 6, 1993
    Assignee: Riker Laboratories, Inc.
    Inventors: Tarlochan S. Purewal, David J. Greenleaf