Inventor · disambiguated record
Duncan William John Mccallien
Also filed as: MCCALLIEN DUNCAN · MCCALLIEN DUNCAN WILLIAM JOHN
9 granted patents·5 pending applications·14 citations·filing 2008–2021
79Inventor score
Files withJOHNSON MATTHEY PLC8CROUD VINCENT BRIAN2GREEN DARRELL1MCCALLIEN DUNCAN1MCCALLIEN DUNCAN WILLIAM JOHN1
Top patents by PatentIndex Score
14 records- 0184US8906698B2Method and apparatus for measuring fluorescence in liquidsCROUD VINCENT BRIAN·Filed 2010·Granted Dec 9, 2014·10 cites·14 claims
- 0269US10816533B2Method of marking hydrocarbon liquidsJOHNSON MATTHEY PLC·Filed 2018·Granted Oct 27, 2020·0 cites·10 claims
- 0366US9658202B2Tagging methodGREEN DARRELL·Filed 2008·Granted May 23, 2017·4 cites·15 claims
- 0465US10106754B2Method of marking hydrocarbon liquidsJOHNSON MATTHEY PLC·Filed 2017·Granted Oct 23, 2018·0 cites·12 claims
- 0559US9678054B2Method of marking hydrocarbon liquidsSTUBBS DAVID·Filed 2012·Granted Jun 13, 2017·0 cites·4 claims
- 0657US2017175017A1Method of making hydrocarbon liquidsJOHNSON MATTHEY PLC·Filed 2017·Application pending·0 cites
- 0752US9625440B2Method of marking hydrocarbon liquidsMCCALLIEN DUNCAN·Filed 2012·Granted Apr 18, 2017·0 cites·7 claims
- 0845US9506000B2Tracers and method of marking liquidsCROUD VINCENT BRIAN·Filed 2013·Granted Nov 29, 2016·0 cites·22 claims
- 0943US2023021024A1Tracers and method of marking liquidsJOHNSON MATTHEY PLC·Filed 2021·Application pending·0 cites
- 1042US2020276854A1Security device, method of making a security device and method of authenticating a productJOHNSON MATTHEY PLC·Filed 2018·Application pending·0 cites
- 1142US2022298439A1Tracers and method of marking liquidsJOHNSON MATTHEY PLC·Filed 2020·Application pending·0 cites
- 1239US9090841B2Tracers and method of marking hydrocarbon liquidsMCCALLIEN DUNCAN WILLIAM JOHN·Filed 2012·Granted Jul 28, 2015·0 cites·23 claims
- 1338US10267740B2Tracer and method of identifying tracer in productJOHNSON MATTHEY PLC·Filed 2013·Granted Apr 23, 2019·0 cites·13 claims
- 1433US2018155274A1Identifiable chemical productJOHNSON MATTHEY PLC·Filed 2016·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →