Inventor · disambiguated record
Douglas T. Gjerde
Also filed as: GJERDE DOUGLAS · GJERDE DOUGLAS T
103 granted patents·50 pending applications·1,617 citations·filing 1979–2024
99Inventor score
Top patents by PatentIndex Score
153 records- 0197US10107729B2Isolation, detection and use of biological cellsGJERDE DOUGLAS T·Filed 2016·Granted Oct 23, 2018·8 cites·20 claims
- 0296US11137327B2Isolation, detection and use of biological cellsGJERDE DOUGLAS T·Filed 2018·Granted Oct 5, 2021·6 cites·18 claims
- 0396US10830676B2Isolation, detection and use of biological cellsGJERDE DOUGLAS T·Filed 2018·Granted Nov 10, 2020·6 cites·20 claims
- 0496US8148168B2Method and device for sample preparationGJERDE DOUGLAS T·Filed 2010·Granted Apr 3, 2012·34 cites·22 claims
- 0596US7488603B2Method and device for extracting an analytePHYNEXUS INC·Filed 2004·Granted Feb 10, 2009·89 cites·13 claims
- 0695US11097207B2Columns for isolation, detection and use of biological cellsGJERDE DOUGLAS T·Filed 2019·Granted Aug 24, 2021·6 cites·18 claims
- 0795US11077389B2Methods for purifying biological cellsGJERDE DOUGLAS T·Filed 2019·Granted Aug 3, 2021·6 cites·11 claims
- 0895US10220332B2Columns for isolation, detection and use of biological cellsGJERDE DOUGLAS T·Filed 2018·Granted Mar 5, 2019·6 cites·20 claims
- 0994US9920294B2Devices and methods for purification, detection and use of biological cellsGJERDE DOUGLAS T·Filed 2015·Granted Mar 20, 2018·9 cites·13 claims
- 1094US9370732B2Methods for purifying biological cellsGJERDE DOUGLAS T·Filed 2014·Granted Jun 21, 2016·10 cites·11 claims
- 1193US10307693B2Methods for purifying biological cellsGJERDE DOUGLAS T·Filed 2016·Granted Jun 4, 2019·6 cites·9 claims
- 1293US8362219B2Open channel solid phase extraction systems and methodsPHYNEXUS INC·Filed 2010·Granted Jan 29, 2013·14 cites·19 claims
- 1391US9637719B2Devices and methods for purification of biological cellsGJERDE DOUGLAS T·Filed 2014·Granted May 2, 2017·9 cites·22 claims
- 1491US8377715B2Method and device for sample preparationPHYNEXUS INC·Filed 2010·Granted Feb 19, 2013·14 cites·7 claims
- 1591US8148169B2Method and device for extracting an analyteGJERDE DOUGLAS T·Filed 2011·Granted Apr 3, 2012·9 cites·10 claims
- 1691US7122640B2Open channel solid phase extraction systems and methodsPHYNEXUS INC·Filed 2004·Granted Oct 17, 2006·51 cites·7 claims
- 1791US5338448AMethod of preventing contamination of a chromatography columnSARASEP INC·Filed 1993·Granted Aug 16, 1994·92 cites·22 claims
- 1890US9891148B2Method and apparatus for pipette tip columnsGJERDE DOUGLAS T·Filed 2015·Granted Feb 13, 2018·7 cites·22 claims
- 1990US6372142B1Column for DNA separation by matched ion polynucleotide chromatographyTRANSGENOMIC INC·Filed 2000·Granted Apr 16, 2002·30 cites·10 claims
- 2089US11998893B2Columns and methods of use for analytical standards and compoundsJAKSCHITZ THOMAS·Filed 2023·Granted Jun 4, 2024·1 cites·9 claims
- 2189US6265168B1Apparatus and method for separating and purifying polynucleotidesTRANSGENOMIC INC·Filed 1999·Granted Jul 24, 2001·65 cites·49 claims
- 2289US6210885B1Modifying double stranded DNA to enhance separations by matched ion polynucleotide chromatographyTRANSGENOMIC INC·Filed 1998·Granted Apr 3, 2001·55 cites·29 claims
- 2388US8057668B2Method and device for extracting an analyteGJERDE DOUGLAS T·Filed 2010·Granted Nov 15, 2011·6 cites·21 claims
- 2488US7482169B2Low dead volume extraction column devicePHYNEXUS INC·Filed 2003·Granted Jan 27, 2009·38 cites·18 claims
- 2588US7151167B2Open channel solid phase extraction systems and methodsPHYNEXUS INC·Filed 2004·Granted Dec 19, 2006·32 cites·19 claims
- 2688US6652745B2Column for DNA separation by matched ion polynucleotide chromatographyTRANSGENOMIC INC·Filed 2002·Granted Nov 25, 2003·19 cites·13 claims
- 2788US6521411B2Method and system for the preparation of cDNATRANSGENOMIC INC·Filed 2001·Granted Feb 18, 2003·40 cites·34 claims
- 2888US5772889ASystem and method for performing nucleic acid separations using liquid chromatographyTRANSGENOMIC INC·Filed 1996·Granted Jun 30, 1998·80 cites·15 claims
- 2987US7612165B2Solid-phase synthesis is a capillaryPHYNEXUS INC·Filed 2006·Granted Nov 3, 2009·7 cites·20 claims
- 3087US6488855B2Non-polar media for polynucleotide separationsTRANSGENOMIC INC·Filed 2001·Granted Dec 3, 2002·24 cites·32 claims
- 3186US8143071B2Method and device for extracting an analyteGJERDE DOUGLAS T·Filed 2007·Granted Mar 27, 2012·10 cites·15 claims
- 3286US7722820B2Method and device for sample preparationPHYNEXUS INC·Filed 2005·Granted May 25, 2010·10 cites·22 claims
- 3385US7875462B2Method and device for sample preparationPHYNEXUS INC·Filed 2010·Granted Jan 25, 2011·4 cites·16 claims
- 3484US7225079B2System and method for automated matched ion polynucleotide chromatographyTRANSGENOMIC INC·Filed 2002·Granted May 29, 2007·25 cites·27 claims
- 3583US9242244B2Method and apparatus for pipette tip columnsGJERDE DOUGLAS T·Filed 2011·Granted Jan 26, 2016·9 cites·25 claims
- 3683US8053247B2Method and device for preparing an analyte for analysis by mass spectrometryPHYNEXUS INC·Filed 2007·Granted Nov 8, 2011·17 cites·13 claims
- 3781US6579459B2System and method for performing polynucleotide separations using liquid chromatographyTRANSGENOMIC INC·Filed 2002·Granted Jun 17, 2003·7 cites·55 claims
- 3881US6521123B2Polynucleotide separations on polymeric separation mediaTRANSGENOMIC INC·Filed 2001·Granted Feb 18, 2003·5 cites·24 claims
- 3981US6455692B1Method of concentrating polynucleotides using MIPCTRANSGENOMIC INC·Filed 2000·Granted Sep 24, 2002·6 cites·7 claims
- 4081US6027898AChromatographic method for mutation detection using mutation site specifically acting enzymes and chemicalsTRANSGENOMIC INC·Filed 1998·Granted Feb 22, 2000·69 cites·31 claims
- 4180US6372130B1Non-polar media for polynucleotide separationsTRANSGENOMIC INC·Filed 2000·Granted Apr 16, 2002·15 cites·19 claims
- 4280US6355165B1MIPC chromatographic apparatus with improved temperature controlTRANSGENOMIC INC·Filed 2000·Granted Mar 12, 2002·27 cites·7 claims
- 4379US7943393B2Method and device for extracting an analytePHYNEXUS INC·Filed 2004·Granted May 17, 2011·14 cites·10 claims
- 4479US7837871B2Method and device for extracting an analytePHYNEXUS INC·Filed 2004·Granted Nov 23, 2010·14 cites·20 claims
- 4579US6066258APolynucleotide separations on polymeric separation mediaTRANSGENOMIC INC·Filed 1998·Granted May 23, 2000·39 cites·9 claims
- 4679US5997742AMethod for performing polynucleotide separations using liquid chromatographyTRANSGENOMIC INC·Filed 1998·Granted Dec 7, 1999·41 cites·13 claims
- 4779US5149661AFluid analysis with particulate reagent suspensionSARASEP INC·Filed 1989·Granted Sep 22, 1992·47 cites·11 claims
- 4878US11656209B2Columns and methods of use for analytical standards and compoundsJAKSCHITZ THOMAS·Filed 2019·Granted May 23, 2023·1 cites·3 claims
- 4978US8679857B2Method and device for sample preparationSUH CHRIS·Filed 2013·Granted Mar 25, 2014·3 cites·9 claims
- 5078US6503397B2Non-polar media for polynucleotide separationsTRANSGENOMIC INC·Filed 2001·Granted Jan 7, 2003·4 cites·11 claims
Showing the top 50 of 153 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →