Patents by Inventor David D. Duncan

David D. Duncan 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).

  • Publication number: 20180164280
    Abstract: Provided herein is technology relating to nanopore analysis of nucleic acids and particularly, but not exclusively, to compositions, methods, systems, and kits for analysis of nucleic acids or other assays comprising nucleic acid components.
    Type: Application
    Filed: November 6, 2017
    Publication date: June 14, 2018
    Inventors: David J. Ecker, Stanley T. Motley, James C. Hannis, Lara G. Krieg, Todd P. Michael, David D. Duncan, Shane G. Poplawski, Thomas N. Chiesl
  • Publication number: 20170253920
    Abstract: Disclosed are methods for multiple displacement amplification of a nucleic acid sequence in a sample. The nucleic acid is contacted with a reaction mixture that includes a set of oligonucleotide primers and a plurality of polymerase enzymes. The reaction mixture is subjected to conditions under which the nucleic acid sequence is amplified to produce an amplification product in a multiple displacement amplification reaction. Also disclosed are kits containing a set of oligonucleotide primers with random sequences having lengths of 6 to 8 nucleobases. At least some of the individual members of the primers have one or more ribose modifications that stabilize or lock the ribose ring in a 3?-endo conformation. At least some of the primers have one or more universal nucleobases.
    Type: Application
    Filed: March 20, 2017
    Publication date: September 7, 2017
    Inventors: David D. Duncan, Mark W. Eshoo
  • Patent number: 9598724
    Abstract: Disclosed are methods for multiple displacement amplification of a nucleic acid sequence in a sample. The nucleic acid is contacted with a reaction mixture that includes a set of oligonucleotide primers and a plurality of polymerase enzymes. The reaction mixture is subjected to conditions under which the nucleic acid sequence is amplified to produce an amplification product in a multiple displacement amplification reaction. Also disclosed are kits containing a set of oligonucleotide primers with random sequences having lengths of 6 to 8 nucleobases. At least some of the individual members of the primers have one or more ribose modifications that stabilize or lock the ribose ring in a 3? -endo conformation. At least some of the primers have one or more universal nucleobases.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: March 21, 2017
    Assignee: IBIS BIOSCIENCES, INC.
    Inventors: David D. Duncan, Mark W. Eshoo
  • Patent number: 9549035
    Abstract: Content items such as web pages can be updated through a client-driven process when the client detects that a target location reference in a source content item has been redirected to another (destination) location reference. Based on a target location reference in a source content item, a client can request a target content item from a target server and can receive a redirected destination target location reference. The client can update local information based on the redirection and/or report the redirect event to a source server that provided the source content item to the client. The source server can update the source content item based on the client's report.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: January 17, 2017
    Assignee: Apple Inc.
    Inventors: David D. Duncan, Morgan H. Winer
  • Publication number: 20160186241
    Abstract: Provided herein are buffers for the stabilization of nucleic acid molecules. The buffers find particular use for the stabilization of trace amounts of nucleic acid molecules in a variety of environments, including repeated freeze/thaw cycles. For example, in some embodiments, provided herein are compositions comprising tris(hydroxymethyl)aminomethane (Tris), ethylenediaminetetraacetic acid (EDTA), polyadenylic acid, and a synthetic DNA oligonucleotide.
    Type: Application
    Filed: March 7, 2016
    Publication date: June 30, 2016
    Inventors: Mark Eshoo, David D. Duncan
  • Patent number: 9279145
    Abstract: Provided herein are buffers for the stabilization of nucleic acid molecules. The buffers find particular use for the stabilization of trace amounts of nucleic acid molecules in a variety of environments, including repeated freeze/thaw cycles. For example, in some embodiments, provided herein are compositions comprising tris(hydroxymethyl)aminomethane (Tris), ethylenediaminetetraacetic acid (EDTA), polyadenylic acid, and a synthetic DNA oligonucleotide.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: March 8, 2016
    Assignee: IBIS BIOSCIENCES, INC.
    Inventors: Mark W. Eshoo, David D. Duncan
  • Publication number: 20140280468
    Abstract: Content items such as web pages can be updated through a client-driven process when the client detects that a target location reference in a source content item has been redirected to another (destination) location reference. Based on a target location reference in a source content item, a client can request a target content item from a target server and can receive a redirected destination target location reference. The client can update local information based on the redirection and/or report the redirect event to a source server that provided the source content item to the client. The source server can update the source content item based on the client's report.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Applicant: Apple Inc.
    Inventors: David D. Duncan, Morgan H. Winer
  • Publication number: 20120171685
    Abstract: Provided herein are buffers for the stabilization of nucleic acid molecules. The buffers find particular use for the stabilization of trace amounts of nucleic acid molecules in a variety of environments, including repeated freeze/thaw cycles. For example, in some embodiments, provided herein are compositions comprising tris(hydroxymethyl)aminomethane (Tris), ethylenediaminetetraacetic acid (EDTA), polyadenylic acid, and a synthetic DNA oligonucleotide.
    Type: Application
    Filed: December 30, 2011
    Publication date: July 5, 2012
    Applicant: Ibis Biosciences, Inc.
    Inventors: Mark W. Eshoo, David D. Duncan
  • Publication number: 20110177515
    Abstract: The present invention provides oligonucleotide primers, compositions, and kits containing the same for rapid identification of bacteria which are members of the Francisella genus by amplification of a segment of bacterial nucleic acid followed by molecular mass analysis.
    Type: Application
    Filed: May 29, 2009
    Publication date: July 21, 2011
    Applicant: IBIS BIOSCIENCES, INC.
    Inventors: Rangarajan Sampath, David J. Ecker, Mark W. Eshoo, David D. Duncan, Feng Li
  • Patent number: 6298488
    Abstract: A kitchen grip or implement for kitchen use is composed of a water-resistant and stain proof material having temperature control characteristics. Such a material forms the implement from at least one sheet having a textured, recessed or irregular surface providing a non-slip contact surface while the opposite surface of the sheet is composed of a close fabricated fabric which is affixed to the sheet of non-slip contact surface material. The fabric sheet may be a sheet of nylon/polyester composition which is affixed to the non-slip contact surface sheet which may be composed of a chloride rubber. The sheets are die cut to the shape of a useful implement such as a hand mitt, a trivet, a lid holder or the like. A two-piece implement such as a hand mitt requires that two sheets of the fabric and chloride rubber composition be sewn together by means of a zigzag lock stitch employing nylon thread.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: October 9, 2001
    Inventors: David D. Duncan, Robin Lee Duncan