Inventor
HOLMQUIST BRETT
US42 patents
⚠️ This page may combine multiple inventors who share the name “HOLMQUIST BRETT”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
QUEST DIAGNOSTICS INVEST INC
26 patentsUS9244084B2Jan 26, 2016
Methods for detecting vitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC24 citations98
US7745226B2Jun 29, 2010
Methods for detecting vitamin D metabolites
QUEST DIAGNOSTICS INVEST INC55 citations98
US7972868B2Jul 5, 2011
Methods for detecting dihydroxyvitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC43 citations97
US9529004B2Dec 27, 2016
Methods for detecting vitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC20 citations96
US8936943B2Jan 20, 2015
Methods for detecting vitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC24 citations96
US8034627B2Oct 11, 2011
Methods for detecting dihydroxyvitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC37 citations96
US11579154B2Feb 14, 2023
Methods for detecting vitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC9 citations94
US10935558B2Mar 2, 2021
Methods for detecting vitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC11 citations94
US10267810B2Apr 23, 2019
Methods for detecting vitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC17 citations94
US9880180B2Jan 30, 2018
Methods for detecting vitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC18 citations94
US9535077B2Jan 3, 2017
Vitamin D metabolite determination utilizing mass spectrometry following derivatization
QUEST DIAGNOSTICS INVEST INC20 citations93
US11650216B2May 16, 2023
Methods for detecting dihydroxyvitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC10 citations92
US7972867B2Jul 5, 2011
Methods for detecting vitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC42 citations92
US11921122B2Mar 5, 2024
Methods for detecting vitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC3 citations86
US11549954B2Jan 10, 2023
Mass spectrometric determination of non-derivatized, non-metabolized vitamin D
QUEST DIAGNOSTICS INVEST INC9 citations86
US10955424B2Mar 23, 2021
Mass spectrometry of steroidal compounds in multiplexed patient samples
QUEST DIAGNOSTICS INVEST INC11 citations86
US9506937B2Nov 29, 2016
Mass spectrometry of steroidal compounds in multiplexed patient samples
QUEST DIAGNOSTICS INVEST INC10 citations84
US12066446B2Aug 20, 2024
Methods for detecting dihydroxyvitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC3 citations73
US11885820B2Jan 30, 2024
Vitamin D metabolite determination utilizing mass spectrometry following derivatization
QUEST DIAGNOSTICS INVEST INC0 citations63
US11852636B2Dec 26, 2023
Mass spectrometric determination of non-derivatized, non-metabolized vitamin D
QUEST DIAGNOSTICS INVEST INC0 citations63
US11808773B2Nov 7, 2023
Mass spectrometry of steroidal compounds in multiplexed patient samples
QUEST DIAGNOSTICS INVEST INC0 citations63
US11280799B2Mar 22, 2022
Mass spectrometric determination of non-derivatized, non-metabolized vitamin D
QUEST DIAGNOSTICS INVEST INC0 citations63
US11105821B2Aug 31, 2021
Vitamin D metabolite determination utilizing mass spectrometry following derivatization
QUEST DIAGNOSTICS INVEST INC0 citations63
US10753950B2Aug 25, 2020
Mass spectrometric determination of non-derivatized, non-metabolized vitamin D
QUEST DIAGNOSTICS INVEST INC0 citations52
US10429398B2Oct 1, 2019
Vitamin D metabolite determination utilizing mass spectrometry following derivatization
QUEST DIAGNOSTICS INVEST INC0 citations52
US8852951B2Oct 7, 2014
Methods for detecting dihydroxyvitamin D metabolites by mass spectrometry
QUEST DIAGNOSTICS INVEST INC0 citations51
HOLMQUIST BRETT
7 patentsUS8173442B2May 8, 2012
Methods for detecting dihydroxyvitamin D metabolites by mass spectrometry
HOLMQUIST BRETT40 citations96
US8076157B2Dec 13, 2011
Vitamin D metabolite determination utilizing mass spectrometry following derivatization
HOLMQUIST BRETT31 citations96
US8084269B2Dec 27, 2011
Methods for detecting dihydroxyvitamin D metabolites by mass spectrometry
HOLMQUIST BRETT36 citations92
US9625477B2Apr 18, 2017
Vitamin D metabolite determination utilizing mass spectrometry following derivatization
HOLMQUIST BRETT3 citations84
US9034653B2May 19, 2015
Mass spectrometry of steroidal compounds in multiplexed patient samples
HOLMQUIST BRETT11 citations84
US8293540B2Oct 23, 2012
Methods for detecting dihydroxyvitamin D metabolites by mass spectrometry
HOLMQUIST BRETT13 citations84
US8389292B2Mar 5, 2013
Methods for detecting dihydroxyvitamin D metabolites by mass spectrometry
HOLMQUIST BRETT5 citations83
LABORATORY CORP AMERICA HOLDINGS
4 patentsUS12025619B2Jul 2, 2024
Methods and systems for detecting prostaglandins by LC-MS/MS
LABORATORY CORP AMERICA HOLDINGS2 citations68
US12352756B2Jul 8, 2025
Methods and systems for detecting prostaglandins by LC-MS/MS
LABORATORY CORP AMERICA HOLDINGS0 citations58
US12105083B2Oct 1, 2024
Methods for detecting antibodies by surface plasmon resonance
LABORATORY CORP AMERICA HOLDINGS0 citations58
US11536733B2Dec 27, 2022
Methods and systems for the detection of 11-oxo androgens by LC-MS/MS
LABORATORY CORP AMERICA HOLDINGS0 citations44