Patents by Inventor David John Crisp

David John Crisp 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).

  • Multiple amplification cycle detection
    Patent number: 11959132
    Abstract: Methods and devices are provided for simultaneously amplifying a plurality of sample wells for a predetermined amount of amplification, detecting whether amplification has occurred in a first set of the wells, amplifying for an additional amount of amplification and detecting whether amplification has occurred in a second set of the wells. Methods are also provided for analyzing a target nucleic acid sequence using melt curves that were generated in a plurality of amplification cycles.
    Type: Grant
    Filed: May 25, 2021
    Date of Patent: April 16, 2024
    Assignee: BioFire Diagnostics, LLC
    Inventors: Randy P. Rasmussen, Robert John Crisp, Andrew Clinton Hemmert, Elizabeth Barker Campbell, Thomas Charles Robbins, David J. Eyre
  • Locking device
    Patent number: 6918620
    Abstract: A pressure-sensitive locking device comprises a housing (2,20) having an opening therein, and an insertable member (1,21) adapted to be inserted into the opening whereupon it can enter into locking engagement with a locking member (4,36) in the housing. The locking member (4,36) is cooperable with a pressure-sensitive mechanism (7,28) in the housing to effect disengagement between the locking member (4,36) and the insertable member (1,21) upon a reduction of pressure.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: July 19, 2005
    Assignee: ITW Limited
    Inventor: David John Crisp
  • Pressure actuated locking device
    Patent number: 6908125
    Abstract: A pressure-sensitive locking device comprises a housing (2,20) having an opening therein, and an insertable member (1,21) adapted to be inserted into the opening whereupon it can enter into locking engagement with a locking member (4,36) in the housing. The locking member (4,36) is cooperable with pressure-sensitive means (7,28) in the housing to effect disengagement between the locking member (4,36) and the insertable member (1,21) upon a reduction of pressure.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: June 21, 2005
    Assignee: ITW Limited
    Inventor: David John Crisp
  • Locking device
    Publication number: 20040222646
    Abstract: A pressure-sensitive locking device comprises a housing (2,20) having an opening therein, and an insertable member (1,21) adapted to be inserted into the opening whereupon it can enter into locking engagement with a locking member (4,36) in the housing. The locking member (4,36) is cooperable with pressure-sensitive means (7,28) in the housing to effect disengagement between the locking member (4,36) and the insertable member (1,21) upon a reduction of pressure.
    Type: Application
    Filed: February 4, 2003
    Publication date: November 11, 2004
    Inventor: David John Crisp
  • Pressure actuated locking device
    Patent number: 6749235
    Abstract: A pressure-sensitive locking device comprises a housing (2,20) having an opening therein, and an insertable member (1,21) adapted to be inserted into the opening whereupon it can enter into locking engagement with a locking member (4,36) in the housing. The locking member (4,36) is cooperable with pressure-sensitive means (7,28) in the housing to effect disengagement between the locking member (4,36) and the insertable member (1,21) upon a reduction of pressure.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: June 15, 2004
    Inventor: David John Crisp
  • Locking device
    Publication number: 20030116978
    Abstract: A pressure-sensitive locking device comprises a housing (2,20) having an opening therein, and an insertable member (1,21) adapted to be inserted into the opening whereupon it can enter into locking engagement with a locking member (4,36) in the housing. The locking member (4,36) is cooperable with pressure-sensitive means (7,28) in the housing to effect disengagement between the locking member (4,36) and the insertable member (1,21) upon a reduction of pressure.
    Type: Application
    Filed: February 4, 2003
    Publication date: June 26, 2003
    Inventor: David John Crisp
  • Applicator device
    Patent number: 3963357
    Abstract: An applicator which is particularly useful for viscous fluids such as adhesives is constructed which comprises a reservoir body which holds the viscous liquid, a discharge nozzle which communicates with the reservoir body, a spreading member which is constructed in a manner suitable for spreading the viscous liquid from the reservoir over the desired surface, and a hinge for positioning the spreading member so that it can be moved between a position which is adjacent to the discharge nozzle and a position remote from the discharge nozzle.
    Type: Grant
    Filed: July 25, 1974
    Date of Patent: June 15, 1976
    Assignee: Beecham Group Limited
    Inventor: David John Crisp