Inventor · disambiguated record
Dean R. Duffy
Also filed as: DUFFY DEAN · DUFFY DEAN R
44 granted patents·13 pending applications·1,064 citations·filing 1995–2021
98Inventor score
Files with3M INNOVATIVE PROPERTIES CO33DUFFY DEAN R103M INNOVATIVE PROPERTIES COMPANY3SPOO SCOTT A3GEBREWOLD YONAS2
Top patents by PatentIndex Score
57 records- 0198US10602785B2Filtering face-piece respirator having nose cushioning member3M INNOVATIVE PROPERTIES CO·Filed 2017·Granted Mar 31, 2020·18 cites·12 claims
- 0297US9868002B2Respirator including contrast layer3M INNOVATIVE PROPERTIES CO·Filed 2014·Granted Jan 16, 2018·26 cites·12 claims
- 0397US9770057B2Filtering face-piece respirator having nose cushioning member3M INNOVATIVE PROPERTIES CO·Filed 2013·Granted Sep 26, 2017·27 cites·9 claims
- 0497US9603395B2Filtering face-piece respirator having darted mask body3M INNOVATIVE PROPERTIES CO·Filed 2013·Granted Mar 28, 2017·24 cites·14 claims
- 0596US10576314B2Respirator including contrast layer3M INNOVATIVE PROPERTIES CO·Filed 2017·Granted Mar 3, 2020·12 cites·19 claims
- 0696US10238158B2Filtering face-piece respirator having darted mask body3M INNOVATIVE PROPERTIES CO·Filed 2016·Granted Mar 26, 2019·13 cites·17 claims
- 0796US10136687B2Filtering face-piece respirator having nose notch3M INNOVATIVE PROPERTIES CO·Filed 2016·Granted Nov 27, 2018·12 cites·4 claims
- 0895US8528560B2Filtering face-piece respirator having parallel line weld pattern in mask bodyDUFFY DEAN R·Filed 2010·Granted Sep 10, 2013·24 cites·16 claims
- 0995US5531892AZigzag filter media and frame having triangular pleat stabilizing elementsMINNESOTA MINING & MFG·Filed 1995·Granted Jul 2, 1996·129 cites·24 claims
- 1094US10182603B2Filtering face-piece respirator having strap-activated folded flange3M INNOVATIVE PROPERTIES CO·Filed 2012·Granted Jan 22, 2019·22 cites·15 claims
- 1194US9603396B2Filtering face-piece respirator having nose notch3M INNOVATIVE PROPERTIES CO·Filed 2013·Granted Mar 28, 2017·17 cites·18 claims
- 1294US8640704B2Flat-fold filtering face-piece respirator having structural weld patternSPOO SCOTT A·Filed 2009·Granted Feb 4, 2014·41 cites·17 claims
- 1393US9615612B2Filtering face-piece respirator with stiffening member integral with filtering structure3M INNOVATIVE PROPERTIES CO·Filed 2013·Granted Apr 11, 2017·17 cites·11 claims
- 1493US9012013B2Expandable face mask with reinforcing nettingDUFFY DEAN R·Filed 2008·Granted Apr 21, 2015·18 cites·18 claims
- 1593US7896940B2Self-supporting pleated filter media3M INNOVATIVE PROPERTIES CO·Filed 2004·Granted Mar 1, 2011·70 cites·44 claims
- 1692US8881729B2Horizontal flat-fold filtering face-piece respirator having indicia of symmetryDUFFY DEAN R·Filed 2009·Granted Nov 11, 2014·21 cites·4 claims
- 1792US7261757B2Slip-rib filter gasketing3M INNOVATIVE PROPERTIES CO·Filed 2004·Granted Aug 28, 2007·60 cites·38 claims
- 1891US8360067B2Expandable face mask with engageable stiffening element3M INNOVATIVE PROPERTIES CO·Filed 2011·Granted Jan 29, 2013·13 cites·20 claims
- 1990US9826786B2Horizontal flat-fold filtering face-piece respirator having indicia of symmetry3M INNOVATIVE PROPERTIES CO·Filed 2014·Granted Nov 28, 2017·11 cites·13 claims
- 2090US8419817B2Self-supporting pleated filter mediaSUNDET DOUGLAS C·Filed 2011·Granted Apr 16, 2013·12 cites·10 claims
- 2190US6406509B1Extruded profile filter framing3M INNOVATIVE PROPERTIES CO·Filed 1999·Granted Jun 18, 2002·89 cites·28 claims
- 2288US7235115B2Method of forming self-supporting pleated filter media3M INNOVATIVE PROPERTIES CO·Filed 2004·Granted Jun 26, 2007·78 cites·31 claims
- 2387US6740136B2Interconnected filter frame and filter framing method3M INNOVATIVE PROPERTIES CO·Filed 2001·Granted May 25, 2004·43 cites·21 claims
- 2486US8074660B2Expandable face mask with engageable stiffening elementDUFFY DEAN R·Filed 2008·Granted Dec 13, 2011·13 cites·22 claims
- 2586US6797028B2“Push-on” self attach adaptive filter3M INNOVATIVE PROPERTIES CO·Filed 2002·Granted Sep 28, 2004·38 cites·44 claims
- 2685US11116998B2Filtering face-piece respirator having folded flange3M INNOVATIVE PROPERTIES CO·Filed 2012·Granted Sep 14, 2021·8 cites·20 claims
- 2785US6419729B1Filter assemblies with adhesive attachment systems3M INNOVATIVE PROPERTIES CO·Filed 2000·Granted Jul 16, 2002·75 cites·29 claims
- 2882US9610528B2Filter frame assembly with sealPORBENI FRANCIS E·Filed 2012·Granted Apr 4, 2017·8 cites·44 claims
- 2980US11083916B2Flat fold respirator having flanges disposed on the mask bodyDUFFY DEAN R·Filed 2008·Granted Aug 10, 2021·9 cites·22 claims
- 3079US8491689B2Joined filter media pleat packsDUFFY DEAN R·Filed 2008·Granted Jul 23, 2013·12 cites·14 claims
- 3178US10040621B2Filtering face-piece respirator dispenser3M INNOVATIVE PROPERTIES CO·Filed 2014·Granted Aug 7, 2018·6 cites·21 claims
- 3273USD659821STriangular bond pattern on a personal respiratory protection maskSPOO SCOTT A·Filed 2009·Granted May 15, 2012·20 cites·1 claims
- 3373US7258717B2Filter cross brace3M INNOVATIVE PROPERTIES CO·Filed 2004·Granted Aug 21, 2007·17 cites·45 claims
- 3471USD652910SFilter cartridgeDUFFY DEAN R·Filed 2009·Granted Jan 24, 2012·17 cites·1 claims
- 3570US12370386B2Flat-fold respirator having flanges disposed on the mask body3M INNOVATIVE PROPERTIES COMPANY·Filed 2021·Granted Jul 29, 2025·0 cites·11 claims
- 3666US2015101617A1Filtering Face-Piece Respirator With Increased Friction Perimeter3M INNOVATIVE PROPERTIES CO·Filed 2013·Application pending·0 cites
- 3764US12434080B2Foldable face-piece respirator with exhalation valve3M INNOVATIVE PROPERTIES COMPANY·Filed 2020·Granted Oct 7, 2025·0 cites·20 claims
- 3863US2022047015A1Respirator including adjustable strap and method of forming same3M INNOVATIVE PROPERTIES CO·Filed 2019·Application pending·0 cites
- 3960US2014182601A1Filtering face-piece respirator having rounded perimeter3M INNOVATIVE PROPERTIES CO·Filed 2012·Application pending·0 cites
- 4058US6926781B2Continuous filter framing strip storable in roll form3M INNOVATIVE PROPERTIES CO·Filed 2002·Granted Aug 9, 2005·14 cites·24 claims
- 4158US2018169447A1Respirator that has inward nose region fold with high level conformation3M INNOVATIVE PROPERTIES CO·Filed 2018·Application pending·0 cites
- 4257USD704824SRespirator having folded nose regionDUFFY DEAN R·Filed 2010·Granted May 13, 2014·10 cites·1 claims
- 4357US2018353782A1Foldable Face-Piece Respirator With Exhalation Valve3M INNOVATIVE PROPERTIES CO·Filed 2016·Application pending·0 cites
- 4456US2017014653A1Filtering Face-Piece Respirator With Increased Friction Perimeter3M INNOVATIVE PROPERTIES CO·Filed 2016·Application pending·0 cites
- 4555US2013340768A1Filtering face-piece respirator having support structure injection molded to filtering structure3M INNOVATIVE PROPERTIES CO·Filed 2013·Application pending·0 cites
- 4654USD652506SFilter cartridge having a magenta nettingHUBERTY JOHN S·Filed 2009·Granted Jan 17, 2012·10 cites·1 claims
- 4753US12150502B2Respirator including transversely-extending pleat and method of forming same3M INNOVATIVE PROPERTIES COMPANY·Filed 2018·Granted Nov 26, 2024·0 cites·30 claims
- 4851US2011315144A1Respirator that has inward nose region fold with high level conformationEITZMAN PHILIP D·Filed 2010·Application pending·0 cites
- 4951US2019090558A1Molded Respirator with Integral Nose Pads Provided by Inwardly-Folded Tabs3M INNOVATIVE PROPERTIES CO·Filed 2016·Application pending·0 cites
- 5049US2014182600A1Filtering face-piece respirator having welded indicia hidden in pleat3M INNOVATIVE PROPERTIES CO·Filed 2012·Application pending·0 cites
Showing the top 50 of 57 patent records by PatentIndex Score.
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