Inventor · disambiguated record
Yuh-Guo Pan
Also filed as: PAN YUH-GUO
62 granted patents·5 pending applications·709 citations·filing 1988–2006
99Inventor score
Top patents by PatentIndex Score
67 records- 0194US6774244B2Primary intermediates for oxidative coloration of hairPROCTER & GAMBLE·Filed 2002·Granted Aug 10, 2004·38 cites·5 claims
- 0294US5849042AHair dye compositions containing 2,3 dialkyl-4-aminophenol and a 2-alkyl-1-naphtholBRISTOL MYERS SQUIBB·Filed 1997·Granted Dec 15, 1998·109 cites·11 claims
- 0390US5993491AOxidative hair dye compositions and methods containing 1-(4-aminophenyl)-2-pyrrolidinemethanolsBRISTOL MYERS SQUIBB CO·Filed 1998·Granted Nov 30, 1999·53 cites·25 claims
- 0489US6461391B1Primary intermediates for oxidative coloration of hairCLAIROL INC·Filed 2001·Granted Oct 8, 2002·32 cites·20 claims
- 0589US5169403ADirect dyes having a quaternary center with a long aliphatic chainCLAIROL INC·Filed 1991·Granted Dec 8, 1992·23 cites·20 claims
- 0688US6342079B1Primary intermediate for use in oxidative hair dyeingBRISTOL MYERS SQUIBB CO·Filed 2000·Granted Jan 29, 2002·24 cites·13 claims
- 0786US5486629ADirect dyes having a quaternary center with a long aliphatic chainCLAIROL INC·Filed 1994·Granted Jan 23, 1996·25 cites·1 claims
- 0883US6521761B2Primary intermediates for oxidative coloration of hairCLAIROL INC·Filed 2000·Granted Feb 18, 2003·14 cites·8 claims
- 0980US5876464AHair dyeing with N-(4-aminophenyl) prolineamide, couplers, and oxidizing agentsBRISTOL MYERS SQUIBB CO·Filed 1998·Granted Mar 2, 1999·52 cites·8 claims
- 1080US5865854ABIS-(2-4-diaminophenoxy) benzenes and their use as coupling components in oxidative hair coloring compositions and methodsBRISTOL MYERS SQUIBB CO·Filed 1997·Granted Feb 2, 1999·21 cites·19 claims
- 1178US6887280B2Hair coloring compositions for use in oxidative hair dyeingPROCTER & GAMBLE·Filed 2002·Granted May 3, 2005·13 cites·18 claims
- 1277US5980584ASubstituted p-aminophenol, process of preparation and use in dyeing hairBRISTOL MYERS SQUIBB CO·Filed 1998·Granted Nov 9, 1999·17 cites·9 claims
- 1374US6572665B2Coupler for use in oxidative hair dyeingCLAIROL INC·Filed 2001·Granted Jun 3, 2003·3 cites·12 claims
- 1472US6916346B2Primary intermediates for oxidative coloration of hairPROCTER & GAMBLE·Filed 2004·Granted Jul 12, 2005·2 cites·18 claims
- 1571US6855174B2Couplers for use in oxidative hair dyeingPROCTER & GAMBLE·Filed 2004·Granted Feb 15, 2005·1 cites·14 claims
- 1671US6750355B2Primary intermediates for oxidative coloration of hairPROCTER & GAMBLE·Filed 2002·Granted Jun 15, 2004·1 cites·6 claims
- 1771US6693196B2Couplers for use in oxidative hair dyeingPROCTER & GAMBLE·Filed 2002·Granted Feb 17, 2004·2 cites·10 claims
- 1871US6589295B2Coupler for use in oxidative hair dyeingCLAIROL INC·Filed 2001·Granted Jul 8, 2003·2 cites·12 claims
- 1971US6409773B1Coupler for use in oxidative hair dyeingCLAIROL INC·Filed 2000·Granted Jun 25, 2002·5 cites·16 claims
- 2070US6200353B1Coupler for use in oxidative hair dyeingBRISTOL MYERS SQUIBB CO·Filed 2000·Granted Mar 13, 2001·4 cites·17 claims
- 2170US5344463AHair dye compositions and methods utilizing 2-substituted-1-naphthol couplersCLAIROL INC·Filed 1993·Granted Sep 6, 1994·40 cites·14 claims
- 2269US5135543AQuaternized monoalkylenediamine nitrobenzene compounds and their use as dyes for keratinaceous fibersCLAIROL INC·Filed 1991·Granted Aug 4, 1992·37 cites·19 claims
- 2368US6562080B2Primary intermediates for oxidative coloration of hairCLAIROL INC·Filed 2001·Granted May 13, 2003·1 cites·27 claims
- 2468US6074438AHair dyeing compositions containing 2-chloro- and 2,6-dichloro-4-aminophenol and phenylpyrazolonesBRISTOL MYERS SQUIBB CO·Filed 1998·Granted Jun 13, 2000·30 cites·25 claims
- 2567US6673932B2Primary intermediates for oxidative coloration of hairPROCTER & GAMBLE·Filed 2002·Granted Jan 6, 2004·1 cites·10 claims
- 2667US6540793B1Coupler for use in oxidative hair dyeingCLAIROL INC·Filed 2000·Granted Apr 1, 2003·1 cites·20 claims
- 2766US5183941AHair dye coupler compoundsCLAIROL INC·Filed 1990·Granted Feb 2, 1993·10 cites·9 claims
- 2865US6908493B2Couplers for use in oxidative hair dyeingPROCTER & GAMBLE·Filed 2004·Granted Jun 21, 2005·0 cites·13 claims
- 2965US4975092AProcesses for coloring and/or conditioning hairCLAIROL INC·Filed 1989·Granted Dec 4, 1990·25 cites·10 claims
- 3061US7070630B2Primary intermediates for oxidative coloration of hairPROCTER & GAMBLE·Filed 2004·Granted Jul 4, 2006·1 cites·13 claims
- 3161US6806372B1Coupler for use in oxidative hair dyeingPROCTER & GAMBLE·Filed 2003·Granted Oct 19, 2004·0 cites·10 claims
- 3260US6673934B2Primary intermediates for oxidative coloration of hairPROCTER & GAMBLE·Filed 2002·Granted Jan 6, 2004·1 cites·10 claims
- 3359US5314505AAminoan thraquinone dyes having a quaternary center with a long aliphatic chainCLAIROL INC·Filed 1992·Granted May 24, 1994·16 cites·8 claims
- 3458US5073173ADye couplersCLAIROL INC·Filed 1990·Granted Dec 17, 1991·6 cites·6 claims
- 3557US5256823AQuarternized monoalkylenediamine nitrobenzene compounds and their use as dyes for keratinaceous fibersCLAIROL INC·Filed 1992·Granted Oct 26, 1993·21 cites·10 claims
- 3657US2006260072A1Primary intermediate for oxidative coloration of hairPROCTER & GAMBLE·Filed 2006·Application pending·0 cites
- 3756US5540738AOxidative hair coloring composition and process for dyeing human keratinous fibersFiled 1995·Granted Jul 30, 1996·20 cites·14 claims
- 3854US6951574B2Primary intermediates for oxidative coloration of hairPROCTER & GAMBLE·Filed 2004·Granted Oct 4, 2005·0 cites·17 claims
- 3953US5298029ANitrophenylenediamine dyes having a quaternary center with a long aliphatic chainCLAIROL INC·Filed 1992·Granted Mar 29, 1994·12 cites·12 claims
- 4051US6916347B2Primary intermediates for oxidative coloration of hairPROCTER & GAMBLE·Filed 2004·Granted Jul 12, 2005·0 cites·18 claims
- 4151US6861556B2Coupler for use in oxidative hair dyeingPROCTER & GAMBLE·Filed 2004·Granted Mar 1, 2005·0 cites·10 claims
- 4251US2005091762A1Primary intermediate for oxidative coloration of hairPROCTER & GAMBLE·Filed 2004·Application pending·0 cites
- 4350US6780999B2Primary intermediates for oxidative coloration of hairPROCTER & GAMBLE·Filed 2002·Granted Aug 24, 2004·0 cites·2 claims
- 4450US6673966B2Coupler for use in oxidative hair dyeingPROCTER & GAMBLE·Filed 2001·Granted Jan 6, 2004·0 cites·10 claims
- 4549US6776802B2Coupler for use in oxidative hair dyeingPROCTER & GAMBLE·Filed 2001·Granted Aug 17, 2004·0 cites·12 claims
- 4649US6750339B2Primary intermediates for oxidative coloration of hairPROCTER & GAMBLE·Filed 2002·Granted Jun 15, 2004·0 cites·6 claims
- 4749US6703526B1Coupler for use in oxidative hair dyeingPROCTER & GAMBLE·Filed 2003·Granted Mar 9, 2004·0 cites·10 claims
- 4849US5486619AMethod of producing DAI from DOPA, using one reaction vesselCLAIROL INC·Filed 1994·Granted Jan 23, 1996·3 cites·20 claims
- 4948US5360930ADirect dyes having a quaternary center with a long aliphatic chainCLAIROL INC·Filed 1994·Granted Nov 1, 1994·9 cites·8 claims
- 5047US6765093B2Couplers for use in oxidative hair dyeingPROCTER & GAMBLE·Filed 2002·Granted Jul 20, 2004·0 cites·5 claims
Showing the top 50 of 67 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →