Inventor · disambiguated record

Brett Holmquist

Also filed as: HOLMQUIST BRETT

42 granted patents·9 pending applications·600 citations·filing 2005–2025

98Inventor score

Technology areasG01N H01J Y10T

Files withQUEST DIAGNOSTICS INVEST INC29 HOLMQUIST BRETT8 LABORATORY CORP AMERICA HOLDINGS6 QUEST DIAGNOSTICS INVEST LLC5 CLARKE NIGEL2

Top patents by PatentIndex Score

51 records

0199US11549954B2Mass spectrometric determination of non-derivatized, non-metabolized vitamin DQUEST DIAGNOSTICS INVEST INC·Filed 2022·Granted Jan 10, 2023·9 cites·12 claims
0298US11921122B2Methods for detecting vitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2023·Granted Mar 5, 2024·3 cites·4 claims
0398US11579154B2Methods for detecting vitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2021·Granted Feb 14, 2023·9 cites·8 claims
0498US10267810B2Methods for detecting vitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2017·Granted Apr 23, 2019·17 cites·16 claims
0598US9880180B2Methods for detecting vitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2016·Granted Jan 30, 2018·18 cites·26 claims
0698US9535077B2Vitamin D metabolite determination utilizing mass spectrometry following derivatizationQUEST DIAGNOSTICS INVEST INC·Filed 2013·Granted Jan 3, 2017·20 cites·30 claims
0798US8084269B2Methods for detecting dihydroxyvitamin D metabolites by mass spectrometryHOLMQUIST BRETT·Filed 2011·Granted Dec 27, 2011·36 cites·24 claims
0898US8076157B2Vitamin D metabolite determination utilizing mass spectrometry following derivatizationHOLMQUIST BRETT·Filed 2011·Granted Dec 13, 2011·31 cites·81 claims
0998US7745226B2Methods for detecting vitamin D metabolitesQUEST DIAGNOSTICS INVEST INC·Filed 2005·Granted Jun 29, 2010·55 cites·23 claims
1097US10935558B2Methods for detecting vitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2019·Granted Mar 2, 2021·11 cites·16 claims
1197US9529004B2Methods for detecting vitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2016·Granted Dec 27, 2016·20 cites·10 claims
1297US9244084B2Methods for detecting vitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2014·Granted Jan 26, 2016·24 cites·20 claims
1397US8936943B2Methods for detecting vitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2013·Granted Jan 20, 2015·24 cites·20 claims
1497US8431411B2Methods for detecting vitamin D metabolites by mass spectrometryCLARKE NIGEL·Filed 2011·Granted Apr 30, 2013·28 cites·25 claims
1597US8173442B2Methods for detecting dihydroxyvitamin D metabolites by mass spectrometryHOLMQUIST BRETT·Filed 2011·Granted May 8, 2012·40 cites·26 claims
1697US8034627B2Methods for detecting dihydroxyvitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2009·Granted Oct 11, 2011·37 cites·24 claims
1797US7972868B2Methods for detecting dihydroxyvitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2007·Granted Jul 5, 2011·43 cites·20 claims
1896US12066446B2Methods for detecting dihydroxyvitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2023·Granted Aug 20, 2024·3 cites·7 claims
1996US11650216B2Methods for detecting dihydroxyvitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2020·Granted May 16, 2023·10 cites·7 claims
2096US10955424B2Mass spectrometry of steroidal compounds in multiplexed patient samplesQUEST DIAGNOSTICS INVEST INC·Filed 2016·Granted Mar 23, 2021·11 cites·21 claims
2196US8101427B2Methods for detecting vitamin D metabolites by mass spectrometryCLARKE NIGEL·Filed 2011·Granted Jan 24, 2012·35 cites·23 claims
2296US7972867B2Methods for detecting vitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2006·Granted Jul 5, 2011·42 cites·31 claims
2395US7977117B2Vitamin D metabolite determination utilizing mass spectrometry following derivatizationQUEST DIAGNOSTICS INVEST INCORPRATED·Filed 2009·Granted Jul 12, 2011·30 cites·82 claims
2494US9506937B2Mass spectrometry of steroidal compounds in multiplexed patient samplesQUEST DIAGNOSTICS INVEST INC·Filed 2015·Granted Nov 29, 2016·10 cites·35 claims
2593US9034653B2Mass spectrometry of steroidal compounds in multiplexed patient samplesHOLMQUIST BRETT·Filed 2010·Granted May 19, 2015·11 cites·20 claims
2692US12025619B2Methods and systems for detecting prostaglandins by LC-MS/MSLABORATORY CORP AMERICA HOLDINGS·Filed 2021·Granted Jul 2, 2024·2 cites·21 claims
2792US8293540B2Methods for detecting dihydroxyvitamin D metabolites by mass spectrometryHOLMQUIST BRETT·Filed 2011·Granted Oct 23, 2012·13 cites·22 claims
2890US12287346B2Methods for detecting vitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST LLC·Filed 2024·Granted Apr 29, 2025·0 cites·4 claims
2989US12282032B2Vitamin D metabolite determination utilizing mass spectrometry following derivatizationQUEST DIAGNOSTICS INVEST LLC·Filed 2023·Granted Apr 22, 2025·0 cites·4 claims
3089US2024077503A1Mass spectrometric determination of non-derivatized, non-metabolized vitamin dQUEST DIAGNOSTICS INVEST LLC·Filed 2023·Application pending·0 cites
3187US11852636B2Mass spectrometric determination of non-derivatized, non-metabolized vitamin DQUEST DIAGNOSTICS INVEST INC·Filed 2022·Granted Dec 26, 2023·0 cites·12 claims
3285US8389292B2Methods for detecting dihydroxyvitamin D metabolites by mass spectrometryHOLMQUIST BRETT·Filed 2012·Granted Mar 5, 2013·5 cites·27 claims
3384US2025216404A1Vitamin d metabolite determination utilizing mass spectrometry following derivatizationQUEST DIAGNOSTICS INVEST LLC·Filed 2025·Application pending·0 cites
3484US2024361344A1Methods for detecting dihydroxyvitamin d metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST LLC·Filed 2024·Application pending·0 cites
3582US12352756B2Methods and systems for detecting prostaglandins by LC-MS/MSLABORATORY CORP AMERICA HOLDINGS·Filed 2024·Granted Jul 8, 2025·0 cites·18 claims
3681US11885820B2Vitamin D metabolite determination utilizing mass spectrometry following derivatizationQUEST DIAGNOSTICS INVEST INC·Filed 2021·Granted Jan 30, 2024·0 cites·7 claims
3780US11105821B2Vitamin D metabolite determination utilizing mass spectrometry following derivatizationQUEST DIAGNOSTICS INVEST INC·Filed 2019·Granted Aug 31, 2021·0 cites·12 claims
3880US9625477B2Vitamin D metabolite determination utilizing mass spectrometry following derivatizationHOLMQUIST BRETT·Filed 2011·Granted Apr 18, 2017·3 cites·15 claims
3978US11808773B2Mass spectrometry of steroidal compounds in multiplexed patient samplesQUEST DIAGNOSTICS INVEST INC·Filed 2021·Granted Nov 7, 2023·0 cites·19 claims
4078US2024410881A1Methods and systems for detecting antibodies by surface plasmon resonanceLABORATORY CORP AMERICA HOLDINGS·Filed 2024·Application pending·0 cites
4177US11280799B2Mass spectrometric determination of non-derivatized, non-metabolized vitamin DQUEST DIAGNOSTICS INVEST INC·Filed 2020·Granted Mar 22, 2022·0 cites·14 claims
4275US10753950B2Mass spectrometric determination of non-derivatized, non-metabolized vitamin DQUEST DIAGNOSTICS INVEST INC·Filed 2018·Granted Aug 25, 2020·0 cites·13 claims
4366US2017115314A1Mass spectrometric determination of cookson-derivatized, non-metabolized vitamin dQUEST DIAGNOSTICS INVEST INC·Filed 2016·Application pending·0 cites
4465US12105083B2Methods for detecting antibodies by surface plasmon resonanceLABORATORY CORP AMERICA HOLDINGS·Filed 2020·Granted Oct 1, 2024·0 cites·15 claims
4562US2023128672A1Methods and Systems for Measuring Progesterone MetabolitesLABORATORY CORP AMERICA HOLDINGS·Filed 2022·Application pending·0 cites
4661US10429398B2Vitamin D metabolite determination utilizing mass spectrometry following derivatizationQUEST DIAGNOSTICS INVEST INC·Filed 2017·Granted Oct 1, 2019·0 cites·14 claims
4758US2011240840A1Mass spectrometric determination of cookson-derivatized, non-metabolized vitamin dQUEST DIAGNOSTICS INVEST INC·Filed 2010·Application pending·0 cites
4858US2012025067A1Mass spectrometric determination of non-derivatized, non-metabolized vitamin dHOLMQUIST BRETT·Filed 2010·Application pending·0 cites
4957US8852951B2Methods for detecting dihydroxyvitamin D metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2013·Granted Oct 7, 2014·0 cites·20 claims
5057US2014234989A1Methods for detecting dihydroxyvitamin d metabolites by mass spectrometryQUEST DIAGNOSTICS INVEST INC·Filed 2014·Application pending·0 cites

Showing the top 50 of 51 patent records by PatentIndex Score.

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →