Inventor · disambiguated record
Douglas G. Crofoot
Also filed as: CROFOOT DOUGLAS G
23 granted patents·1 pending application·2,170 citations·filing 1990–2019
98Inventor score
Top patents by PatentIndex Score
24 records- 0199US10967315B2Fine fiber media layerDONALDSON CO INC·Filed 2019·Granted Apr 6, 2021·29 cites·9 claims
- 0299US8366797B2Fine fiber media layerDONALDSON CO INC·Filed 2011·Granted Feb 5, 2013·58 cites·14 claims
- 0399US8029588B2Fine fiber media layerDONALDSON CO INC·Filed 2010·Granted Oct 4, 2011·38 cites·7 claims
- 0499US7318852B2Bag house filter with fine fiber and spun bonded mediaDONALDSON CO INC·Filed 2006·Granted Jan 15, 2008·109 cites·59 claims
- 0599US7316723B2Air filter with fine fiber and spun bonded mediaDONALDSON CO INC·Filed 2006·Granted Jan 8, 2008·155 cites·16 claims
- 0699US7179317B2Polymer, polymer microfiber, polymer nanofiber and applications including filter structuresDONALDSON CO INC·Filed 2004·Granted Feb 20, 2007·122 cites·102 claims
- 0799US7090715B2Polymer, polymer microfiber, polymer nanofiber and applications including filter structuresDONALDSON CO INC·Filed 2003·Granted Aug 15, 2006·127 cites·15 claims
- 0899US7070640B2Polymer, polymer microfiber, polymer nanofiber and applications including filter structuresDONALDSON CO INC·Filed 2004·Granted Jul 4, 2006·138 cites·69 claims
- 0999US6955775B2Process if making fine fiber materialDONALDSON CO INC·Filed 2003·Granted Oct 18, 2005·180 cites·16 claims
- 1099US6924028B2Polymer, polymer microfiber, polymer nanofiber and applications including filter structuresDONALDSON CO INC·Filed 2003·Granted Aug 2, 2005·168 cites·30 claims
- 1199US6743273B2Polymer, polymer microfiber, polymer nanofiber and applications including filter structuresDONALDSON CO INC·Filed 2001·Granted Jun 1, 2004·427 cites·15 claims
- 1298US7318853B2Polymer, polymer microfiber, polymer nanofiber and applications including filter structuresDONALDSON CO INC·Filed 2006·Granted Jan 15, 2008·52 cites·15 claims
- 1398US7270693B2Polymer, polymer microfiber, polymer nanofiber and applications including filter structuresDONALDSON CO INC·Filed 2006·Granted Sep 18, 2007·116 cites·127 claims
- 1497US8709118B2Fine fiber media layerDONALDSON CO INC·Filed 2013·Granted Apr 29, 2014·9 cites·19 claims
- 1597US7918913B2Reduced solidity web comprising fiber and fiber spacer or separation meansDONALDSON CO INC·Filed 2009·Granted Apr 5, 2011·54 cites·5 claims
- 1697US6746517B2Filter structure with two or more layers of fine fiber having extended useful service lifeDONALDSON CO INC·Filed 2001·Granted Jun 8, 2004·184 cites·41 claims
- 1796US8118901B2Fine fiber media layerCHUNG HOO Y·Filed 2009·Granted Feb 21, 2012·35 cites·7 claims
- 1895US9718012B2Fine fiber media layerDONALDSON CO INC·Filed 2014·Granted Aug 1, 2017·9 cites·13 claims
- 1995US8512431B2Fine fiber media layerCHUNG HOO Y·Filed 2012·Granted Aug 20, 2013·14 cites·12 claims
- 2092US7717975B2Reduced solidity web comprising fiber and fiber spacer or separation meansDONALDSON CO INC·Filed 2006·Granted May 18, 2010·34 cites·31 claims
- 2192US5066400ASelf-spaced pleated filterDONALDSON CO INC·Filed 1990·Granted Nov 19, 1991·103 cites·12 claims
- 2287US8177876B2Reduced solidity web comprising fiber and fiber spacer or separation meansKALAYCI VELI E·Filed 2011·Granted May 15, 2012·7 cites·30 claims
- 2386US10272374B2Fine fiber media layerDONALDSON CO INC·Filed 2017·Granted Apr 30, 2019·2 cites·9 claims
- 2431US2004116025A1Air permeable garment and fabric with integral aerosol filtrationFiled 2002·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Douglas G. Crofoot files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →