Patents by Inventor CHRISTIAN F. JOHNSON

CHRISTIAN F. JOHNSON 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: 20190249238
    Abstract: This disclosure provides a method of forming tagged nucleic acid sequences. A target polynucleotide is immobilized on a solid support; a recognition-oligonucleotide is hybridized thereto; the recognition-oligonucleotide-target polynucleotide hybrid is cleaved; and an adapter nucleic acid is ligated to the cleaved target polynucleotide, thereby forming a tagged nucleic acid sequence. Also provided is a method of forming a tagged single stranded cDNA; a method of forming a plurality of tagged heterogeneous nucleic acid sequences; a library of recognition-oligonucleotides; and methods for amplifying a cDNA sequence immobilized on a solid support. These methods and products can be used alone or in combination for integrated single cell sequencing, and can be adapted for use in a microfluidic apparatus or device.
    Type: Application
    Filed: December 21, 2018
    Publication date: August 15, 2019
    Inventors: Jason A.A. West, Brian Fowler, Tze-Howe Charn, Christian F. Johnson, Marc A. Unger
  • Publication number: 20150337295
    Abstract: This disclosure provides a method of forming tagged nucleic acid sequences. A target polynucleotide is immobilized on a solid support; a recognition-oligonucleotide is hybridized thereto; the recognition-oligonucleotide-target polynucleotide hybrid is cleaved; and an adapter nucleic acid is ligated to the cleaved target polynucleotide, thereby forming a tagged nucleic acid sequence. Also provided is a method of forming a tagged single stranded cDNA; a method of forming a plurality of tagged heterogeneous nucleic acid sequences; a library of recognition-oligonucleotides; and methods for amplifying a cDNA sequence immobilized on a solid support. These methods and products can be used alone or in combination for integrated single cell sequencing, and can be adapted for use in a microfluidic apparatus or device.
    Type: Application
    Filed: May 8, 2015
    Publication date: November 26, 2015
    Inventors: JASON A.A. WEST, BRIAN FOWLER, TZE-HOWE CHARN, CHRISTIAN F. JOHNSON, MARC A. UNGER
  • Patent number: 4738573
    Abstract: A silicon wafer diffusion processing quartz boat carrier slot plunge cutter machine is provided that has a vertical rapid traverse power feed variable speed spindle with automatic stop switches controlling down feed and return with spindle speeds generally in the range of 3,000 RPM to 4,500 RPM for effective quartz slot cutting. Work piece table longitudinal and cross travel are manually driven with longitudinal travel for work piece to cutting tool alignment and cross travel being for indexing of specific slotting configurations. A fixed table support is adapted to mounting of various jig types for slotting as desired.
    Type: Grant
    Filed: January 8, 1987
    Date of Patent: April 19, 1988
    Inventor: Christian F. Johnson, Jr.