Inventor · disambiguated record
Subhasish Purkayastha
Also filed as: PURKAYASTHA SUBHASISH
32 granted patents·28 pending applications·103 citations·filing 2001–2025
95Inventor score
Files withDH TECHNOLOGIES DEV PTE LTD30APPLERA CORP7BECKMAN COULTER INC6PURKAYASTHA SUBHASISH4DEY SUBHAKAR3
Top patents by PatentIndex Score
60 records- 0194US7355045B2Isotopically enriched N-substituted piperazine acetic acids and methods for the preparation thereofAPPLERA CORP·Filed 2004·Granted Apr 8, 2008·43 cites·26 claims
- 0292US12379370B2Integrated sample processing system with variable workflowsBECKMAN COULTER INC·Filed 2023·Granted Aug 5, 2025·1 cites·23 claims
- 0390US11988670B2Integrated sample processing system with multiple detection capabilityBECKMAN COULTER INC·Filed 2022·Granted May 21, 2024·1 cites·19 claims
- 0488US11402386B2Integrated sample processing system with multiple detection capabilityBECKMAN COULTER INC·Filed 2018·Granted Aug 2, 2022·5 cites·21 claims
- 0585US8273706B2Isobarically labeled analytes and fragment ions derived therefromPAPPIN DARRYL J C·Filed 2009·Granted Sep 25, 2012·5 cites·7 claims
- 0685US2025347678A1Integrated sample processing system with variable workflowsBECKMAN COULTER INC·Filed 2025·Application pending·0 cites
- 0781US10656147B2Magnetic elements for processing fluidsDH TECHNOLOGIES DEV PTE LTD·Filed 2015·Granted May 19, 2020·2 cites·12 claims
- 0880US8236565B2Tagging reagents and methods for hydroxylated compoundsPURKAYASTHA SUBHASISH·Filed 2007·Granted Aug 7, 2012·4 cites·22 claims
- 0980US7183116B2Methods for isolation and labeling of sample moleculesAPPLERA CORP·Filed 2001·Granted Feb 27, 2007·16 cites·57 claims
- 1079US11619623B2Integrated sample processing system with variable workflowsBECKMAN COULTER INC·Filed 2018·Granted Apr 4, 2023·1 cites·20 claims
- 1179US2023236189A1Microbial Identification and Quantitation Using MS Cleavable TagsDH TECHNOLOGIES DEV PTE LTD·Filed 2023·Application pending·0 cites
- 1279US2025027950A1Integrated Sample Processing System with Multiple Detection CapabilityBECKMAN COULTER INC·Filed 2024·Application pending·0 cites
- 1376US8617898B2Quantitative analysis of vitamin D3, vitamin D2, and metabolites thereofDEY SUBHAKAR·Filed 2011·Granted Dec 31, 2013·5 cites·43 claims
- 1475US9188596B2Quantitative analysis of vitamin D3, vitamin D2, and metabolites thereofDH TECHNOLOGIES DEV PTE LTD·Filed 2013·Granted Nov 17, 2015·4 cites·9 claims
- 1574US10281468B2Microbial identification and quantitation using MS cleavable tagsDH TECHNOLOGIES DEV PTE LTD·Filed 2015·Granted May 7, 2019·1 cites·7 claims
- 1671US11549944B2Microbial identification and quantitation using MS cleavable tagsDH TECHNOLOGIES DEV PTE LTD·Filed 2019·Granted Jan 10, 2023·0 cites·10 claims
- 1768US9874575B2Analysis of estradiol and analytes with phenolic OH using labeling chemistry and LC-MSMS workflowDH TECHNOLOGIES DEV PTE LTD·Filed 2013·Granted Jan 23, 2018·1 cites·18 claims
- 1868US8501498B2Mass tags for quantitative analysesYAN XIONGWEI·Filed 2009·Granted Aug 6, 2013·1 cites·18 claims
- 1967US8362242B2Analyte determination utilizing mass tagging reagents comprising a non-encoded detectable labelDH TECHNOLOGIES DEV PTE LTD·Filed 2007·Granted Jan 29, 2013·0 cites·2 claims
- 2066US8975404B2Labeling reagents for analyte determination and methods and compounds used in making the samePILLAI SASI K·Filed 2007·Granted Mar 10, 2015·1 cites·14 claims
- 2166US8569304B2Active esters of N-substituted piperazine acetic acids, including isotopically enriched versions thereofDEY SUBHAKAR·Filed 2009·Granted Oct 29, 2013·0 cites·48 claims
- 2265US8372653B2Mass tag reagents for simultaneous quantitation and identification of small moleculesDH TECHNOLOGIES DEV PTE LTD·Filed 2011·Granted Feb 12, 2013·2 cites·13 claims
- 2364US7906341B2Methods, mixtures, kits and compositions pertaining to analyte determinationDH TECHNOLOGIES DEV PTE LTD·Filed 2007·Granted Mar 15, 2011·4 cites·48 claims
- 2462US2015045256A1Mass spectrometry quantitation of p450 protein isoforms in hepatocytesDH TECHNOLOGIES DEV PTE LTD·Filed 2014·Application pending·0 cites
- 2560US2024230633A1Enzyme-conjugated magnetic beads suspended in internal standard bufferDH TECHNOLOGIES DEV PTE LTD·Filed 2022·Application pending·0 cites
- 2659US7364911B2Methods for isolating and labeling sample moleculesAEBERSOLD RUDOLF H·Filed 2002·Granted Apr 29, 2008·3 cites·31 claims
- 2759US2010136703A1Thyroxine-Containing Compound Analysis MethodsLIFE TECHNOLOGIES CORP·Filed 2009·Application pending·0 cites
- 2858US9546393B2Mass spectrometry quantitation of P450 isoforms in hepatocytesDH TECHNOLOGIES DEV PTE LTD·Filed 2015·Granted Jan 17, 2017·0 cites·2 claims
- 2958US2024168040A1Biological sample preparation and analysisDH TECHNOLOGIES DEV PTE LTD·Filed 2022·Application pending·0 cites
- 3058US2009176984A1Isotopically Enriched N-Substituted Piperazine Acetic Acids And Methods For The Preparation ThereofDEY SUBHAKAR·Filed 2008·Application pending·0 cites
- 3158US2025157803A1Natural Isotopologues Based-Mass Spectrometer CalibrationDH TECHNOLOGIES DEV PTE LTD·Filed 2022·Application pending·0 cites
- 3257US2024003846A1Methods For Detection Of Isomeric Steroids Using Differential Mobility SpectrometryDH TECHNOLOGIES DEV PTE LTD·Filed 2021·Application pending·0 cites
- 3356US8853133B2Analyte determination utilizing mass tagging reagents comprising a non-encoded detectable labelPURKAYASTHA SUBHASISH·Filed 2012·Granted Oct 7, 2014·0 cites·19 claims
- 3456US2025136810A1Discrete peg molecules as analytes for ms calibration and tuning in positive and negative modesDH TECHNOLOGIES DEV PTE LTD·Filed 2022·Application pending·0 cites
- 3556US2005148087A1Isobarically labeled analytes and fragment ions derived therefromAPPLERA CORP·Filed 2004·Application pending·0 cites
- 3655US9964552B2Mass spectrometric identification and/or quantitation of catecholamines using aminopyrazolesDH TECHNOLOGIES DEV PTE LTD·Filed 2014·Granted May 8, 2018·0 cites·8 claims
- 3755US9257267B2Composition, method, and kit for calibrating a mass spectrometerDEY SUBHAKAR N·Filed 2012·Granted Feb 9, 2016·1 cites·13 claims
- 3855US2025003929A1High throughput screening and quantification for target analytes using echo ms and single tube calibrationDH TECHNOLOGIES DEV PTE LTD·Filed 2022·Application pending·0 cites
- 3955US2024345043A1Scout mrm for screening and diagnostic assaysDH TECHNOLOGIES DEV PTE LTD·Filed 2022·Application pending·0 cites
- 4054US2023258652A1Phenacylbromide-Based Mass Tags For Carboxyl And Phenolic Functional Group Containing AnalytesDH TECHNOLOGIES DEV PTE LTD·Filed 2021·Application pending·0 cites
- 4151US10094809B2Specific analysis of ketone and aldehyde analytes using reagent compounds, labeling strategies, and mass spectrometry workflowDH TECHNOLOGIES DEV PTE LTD·Filed 2016·Granted Oct 9, 2018·0 cites·20 claims
- 4251US2024420939A1Ultra high throughput screening combined with definitive testing in a single sample preparation stepDH TECHNOLOGIES DEV PTE LTD·Filed 2022·Application pending·0 cites
- 4350US9500622B2Specific analysis of ketone and aldehyde analytes using reagent compounds, labeling strategies, and mass spectrometry workflowDH TECHNOLOGIES DEV PTE LTD·Filed 2013·Granted Nov 22, 2016·0 cites·9 claims
- 4450US8940545B2Mass spectrometry quantitation of P450 isoforms in hepatocytesWILLIAMSON BRIAN L·Filed 2010·Granted Jan 27, 2015·0 cites·5 claims
- 4550US8569071B2Amine-containing compound analysis methodsNIMKAR SUBODH B·Filed 2009·Granted Oct 29, 2013·2 cites·30 claims
- 4649US2004110186A1Methods for isolating and labeling sample moleculesINST SYSTEMS BIOLOGY·Filed 2003·Application pending·0 cites
- 4748US2024177984A1Workflow for high-throughput analysis of analytes in liquid samplesDH TECHNOLOGIES DEV PTE LTD·Filed 2022·Application pending·0 cites
- 4847US10078091B2Analysis of a panel of cerebrotendinous xanthomatosis biomarkers using site specific derivation and LC/MS/MS workflowDH TECHNOLOGIES DEV PTE LTD·Filed 2013·Granted Sep 18, 2018·0 cites·16 claims
- 4947US2005147985A1Mixtures of isobarically labeled analytes and fragments ions derived therefromAPPLERA CORP·Filed 2004·Application pending·0 cites
- 5046US2006183238A1Amine-containing compound analysis methodsAPPLERA CORP·Filed 2006·Application pending·0 cites
Showing the top 50 of 60 patent records by PatentIndex Score.
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