Patents by Inventor David Andrewes

David Andrewes 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).

  • Ballast water monitoring device
    Patent number: 10481064
    Abstract: A ballast water monitoring device and a method for detecting live phytoplankton are disclosed. The device comprises a chamber for receiving a sample, at least one light source to emit light towards the sample, a light detector to receive light from the sample and generate a light signal, and a controller. The controller is configured to control the at least one light source to emit a single pulse of light, calculate the variable fluorescence [Fv] of the sample in response to the pulse of light, at time intervals less than the duration of the pulse of light, compare the calculated variable fluorescence to a predetermined reference limit, and perform an action if the calculated variable fluorescence is greater than the predetermined reference limit.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: November 19, 2019
    Assignee: CHELSEA TECHNOLOGIES GROUP LTD
    Inventors: Kevin Oxborough, John Attridge, David Andrewes
  • BALLAST WATER MONITORING DEVICE
    Publication number: 20190033193
    Abstract: A ballast water monitoring device and a method for detecting live phytoplankton are disclosed. The device comprises a chamber for receiving a sample, at least one light source to emit light towards the sample, a light detector to receive light from the sample and generate a light signal, and a controller. The controller is configured to control the at least one light source to emit a single pulse of light, calculate the variable fluorescence [Fv] of the sample in response to the pulse of light, at time intervals less than the duration of the pulse of light, compare the calculated variable fluorescence to a predetermined reference limit, and perform an action if the calculated variable fluorescence is greater than the predetermined reference limit.
    Type: Application
    Filed: August 10, 2016
    Publication date: January 31, 2019
    Applicant: CHELSEA TECHNOLOGIES GROUP LTD
    Inventors: Kevin OXBOROUGH, John ATTRIDGE, David ANDREWES
  • Device and apparatus for conducting an assay
    Patent number: 6300142
    Abstract: A apparatus for assaying glycated proteins and other analytes in biological samples such as blood, in which a sample is presented to the apparatus, includes an inlet port between moveable between first and second inlets, such that the inlet can be brought into liquid communication with each inlet in turn. The inlet port accommodates a filter or binder. The apparatus also includes a microprocessor operable via a key pad, at least one light emitter and at least one light detector, a display and driver, and an A to D converter, and is operatively connected to a power source.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: October 9, 2001
    Assignee: Provalis Diagnostics LTD
    Inventors: David Andrewes, John Worthington Attridge, David Griffiths, John Phillip Vessey, John Anthony Odell, Felix Fernando, Anthony Stevenson, Mark Gresswell, John Curtis, David Alan Percival
  • Sample holder for spectrophotometer
    Patent number: D443539
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: June 12, 2001
    Assignee: Provalis Diagnostics Limited
    Inventors: Anthony Stevenson, Mark Cresswell, John Curtis, David Alan Percival, David Andrewes, Anthony O'Dell, John Attridge, John Phillip Vessey, Felix Fernando
  • Spectrophotometer
    Patent number: D447713
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: September 11, 2001
    Assignee: Provalis Diagnostics Limited
    Inventors: Anthony Stevenson, Mark Cresswell, John Curtis, David Alan Percival, David Andrewes, Anthony O'Dell, John Attridge, John Phillip Vessey, Felix Fernando