Patents by Inventor Howard Peter Duffield

Howard Peter Duffield 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).

  • Guide Device For A Liquid Dispenser
    Publication number: 20150328044
    Abstract: A guide device for assisting the application of a liquid from a dispenser to the eye of a subject has a mount to hold the liquid dispenser in the guide device, a rest to align the guide device with the subject head, and an indicator, selectively visible to indicate when the guide device is tilted at or beyond a minimum guide angle. Preferably, the indicator is selectively visible to indicate when the guide device is tilted at, or between, the minimum guide angle and a maximum guide angle. Said minimum guide angle corresponds with a minimum predetermined tilt of the subject head suitable for delivery of the liquid from the dispenser. The maximum guide angle corresponds with a maximum predetermined tilt of the subject head suitable for delivery of the liquid.
    Type: Application
    Filed: December 18, 2013
    Publication date: November 19, 2015
    Inventors: James Coop, Gary Thomas CROSBY, Howard Peter DUFFIELD, Mark Andrew Hailey, Mark Teucher, James WEST
  • Metering method for particulate material
    Patent number: 7621300
    Abstract: There is provided a method for metering a quantity of a particulate material onto the surface of a porous retainer comprising the steps of: exposing a first surface of a porous retainer to a pool of particulate material; applying a vacuum to a second surface of the porous retainer to meter material on the first surface; and adjusting the level of the vacuum to regulate the quantity of material metered on the retainer.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: November 24, 2009
    Assignee: Glaxo Group Limited
    Inventors: Stanley George Bonney, Howard Peter Duffield
  • Method and apparatus for transferring a defined quantity of powder
    Patent number: 6886612
    Abstract: There is provided a method of transferring a defined quantity of powder comprising compacting a target area of powder; dipping a tube into the compacted target area of powder to fill the tube with a defined volume of powder; and transferring the defined volume of powder from the tube.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: May 3, 2005
    Assignee: SmithKline Beecham Corporation
    Inventor: Howard Peter Duffield
  • Metering method for particulate material
    Publication number: 20040168739
    Abstract: There is provided a method for metering a quantity of a particulate material onto the surface of a porous retainer comprising the steps of: exposing a first surface of a porous retainer to a pool of particulate material; applying a vacuum to a second surface of the porous retainer to meter material on the first surface; and adjusting the level of the vacuum to regulate the quantity of material metered on the retainer.
    Type: Application
    Filed: October 17, 2003
    Publication date: September 2, 2004
    Inventors: Stanley George Bonney, Howard Peter Duffield
  • Method and apparatus for transferring a defined quantity of powder
    Publication number: 20030131905
    Abstract: There is provided a method of transferring a defined quantity of powder comprising compacting a target area of powder; dipping a tube into the compacted target area of powder to fill the tube with a defined volume of powder; and transferring the defined volume of powder from the tube.
    Type: Application
    Filed: November 19, 2002
    Publication date: July 17, 2003
    Inventor: Howard Peter Duffield