Inventor · disambiguated record
Gerhard Pfaff
Also filed as: PFAFF GERHARD
62 granted patents·12 pending applications·1,930 citations·filing 1982–2022
99Inventor score
Top patents by PatentIndex Score
74 records- 0198US6517628B1Pigment mixtureMERCK PATENT GMBH·Filed 2000·Granted Feb 11, 2003·129 cites·19 claims
- 0297US10647861B2α-alumina flakesMERCK PATENT GMBH·Filed 2014·Granted May 12, 2020·11 cites·22 claims
- 0396US6596070B1Interference pigmentsMERCK PATENT GMBH·Filed 1998·Granted Jul 22, 2003·211 cites·13 claims
- 0494US5858078APlatelet-shaped titanium dioxide pigmentMERCK PATENT GMBH·Filed 1998·Granted Jan 12, 1999·171 cites·16 claims
- 0593US7416688B2Transparent conductive pigmentsMERCK PATENT GMBH·Filed 2005·Granted Aug 26, 2008·20 cites·16 claims
- 0693US6648957B1Multilayer nacreous pigmentMERCK PATENT GMBH·Filed 2000·Granted Nov 18, 2003·47 cites·18 claims
- 0792US7691196B2Effect pigmentsMERCK PATENT GMBH·Filed 2007·Granted Apr 6, 2010·14 cites·27 claims
- 0892US6291551B1Laser-markable plasticsMERCK PATENT GMBH·Filed 2000·Granted Sep 18, 2001·49 cites·10 claims
- 0991US5286291APigments containing carbon blackMERCK PATENT GMBH·Filed 1993·Granted Feb 15, 1994·65 cites·18 claims
- 1090US6267810B1Pigment mixtureMERCK PATENT GMBH·Filed 1999·Granted Jul 31, 2001·94 cites·16 claims
- 1190US6156115AMultilayer interference pigment with transparent central layerMERCK PATENT GMBH·Filed 1998·Granted Dec 5, 2000·80 cites·15 claims
- 1288US7255736B2Effect pigments based on thin SiO2 flakesMERCK PATENT GMBH·Filed 2005·Granted Aug 14, 2007·10 cites·12 claims
- 1388US6767633B2Transparent medium having angle-selective transmission or reflection properties and/or absorption propertiesMERCK PATENT GMBH·Filed 2001·Granted Jul 27, 2004·32 cites·15 claims
- 1488US6656259B2Multilayered interference pigmentsMERCK PATENT GMBH·Filed 2002·Granted Dec 2, 2003·38 cites·15 claims
- 1588US6376577B2Laser-markable plasticsMERCK PATENT GMBH·Filed 2000·Granted Apr 23, 2002·25 cites·19 claims
- 1688US5350448AElectrically conductive pigmentsMERCK PATENT GMBH·Filed 1993·Granted Sep 27, 1994·56 cites·9 claims
- 1787US11180659B2Alpha-alumina flakesMERCK PATENT GMBH·Filed 2019·Granted Nov 23, 2021·1 cites·19 claims
- 1887US7169223B1Effect pigments having a strong color flopMERCK PATENT GMBH·Filed 2006·Granted Jan 30, 2007·9 cites·15 claims
- 1987US6294010B1Pigment mixtureMERCK PATENT GMBH·Filed 1999·Granted Sep 25, 2001·51 cites·20 claims
- 2087US6280520B1Multilayer pearl luster pigment based on an opaque substrateMERCK PATENT GMBH·Filed 1999·Granted Aug 28, 2001·57 cites·13 claims
- 2186US6727308B2Laser-markable plasticsMERCK PATENT GMBH·Filed 2001·Granted Apr 27, 2004·27 cites·24 claims
- 2286US5320781AConductive pigmentMERCK PATENT GMBH·Filed 1993·Granted Jun 14, 1994·62 cites·18 claims
- 2385US11891542B2α-alumina flakesMERCK PATENT GMBH·Filed 2022·Granted Feb 6, 2024·0 cites·21 claims
- 2485US11891541B2Alpha-alumina flakesMERCK PATENT GMBH·Filed 2022·Granted Feb 6, 2024·0 cites·21 claims
- 2585US7708823B2Semi-transparent interference pigments containing tinMERCK PATENT GMBH·Filed 2006·Granted May 4, 2010·6 cites·23 claims
- 2683US6284032B2Multilayer interference pigmentsMERCK PATENT GMBH·Filed 2001·Granted Sep 4, 2001·31 cites·16 claims
- 2783US5945035AConductive pigmentsMERCK PATENT GMBH·Filed 1997·Granted Aug 31, 1999·40 cites·16 claims
- 2883US4984977AScrew-type extruder having a starting valve and throttleWERNER & PFLEIDERER·Filed 1989·Granted Jan 15, 1991·53 cites·6 claims
- 2981US7202288B2Laser-markable pigments containing an absorber coated with a markerMERCK PATENT GMBH·Filed 2003·Granted Apr 10, 2007·15 cites·11 claims
- 3081US7156913B2Intensely colored red effect pigmentsMERCK PATENT GMBH·Filed 2006·Granted Jan 2, 2007·5 cites·10 claims
- 3181US6500251B1Multi-coated interference pigmentsMERCK PATENT GMBH·Filed 1997·Granted Dec 31, 2002·45 cites·12 claims
- 3279US5972098ATitanate-containing pearlescent pigmentsMERCK PATENT GMBH·Filed 1997·Granted Oct 26, 1999·40 cites·9 claims
- 3378US11142649B2α-alumina flakesMERCK PATENT GMBH·Filed 2019·Granted Oct 12, 2021·0 cites·20 claims
- 3476US7060126B2Multilayered luster pigmentsMERCK PATENT GMBH·Filed 2002·Granted Jun 13, 2006·23 cites·28 claims
- 3576US6997982B2Pigment with a metallic lusterMERCK PATENT GMBH·Filed 2002·Granted Feb 14, 2006·13 cites·16 claims
- 3676US6552102B2Pigment flakesMERCK PATENT GMBH·Filed 2001·Granted Apr 22, 2003·12 cites·23 claims
- 3776US6132504AMultilayer interference pigment with absorbent central layerMERCK PATENT GMBH·Filed 1998·Granted Oct 17, 2000·37 cites·19 claims
- 3876US2020231828A1Alpha-alumina flakesMERCK PATENT GMBH·Filed 2020·Application pending·0 cites
- 3976US2020231827A1Alpha-alumina flakesMERCK PATENT GMBH·Filed 2020·Application pending·0 cites
- 4075US11773270B2Effect pigmentsMERCK PATENT GMBH·Filed 2020·Granted Oct 3, 2023·0 cites·18 claims
- 4175US6334893B1Pigment mixtureMERCK PATENT GMBH·Filed 1999·Granted Jan 1, 2002·41 cites·21 claims
- 4270US6929690B2Pigment with a metallic lusterMERCK PATENT GMBH·Filed 2002·Granted Aug 16, 2005·13 cites·20 claims
- 4370US6238472B1Metal oxide coated titanium dioxide lamellasMERCK PATENT GMBH·Filed 1997·Granted May 29, 2001·33 cites·16 claims
- 4469US6291065B1Pigment flakesMERCK PATENT GMBH·Filed 1998·Granted Sep 18, 2001·22 cites·18 claims
- 4569US4480301AMethod and apparatus for controlling a pulsed frequency converterSIEMENS AG·Filed 1982·Granted Oct 30, 1984·21 cites·14 claims
- 4668US8337611B2Effect pigmentsPFAFF GERHARD·Filed 2010·Granted Dec 25, 2012·2 cites·18 claims
- 4768US5702518AGold pigmentsMERCK PATENT GES MIT CESCHRANK·Filed 1996·Granted Dec 30, 1997·22 cites·9 claims
- 4867US10457812B2α-alumina flakesMERCK PATENT GMBH·Filed 2014·Granted Oct 29, 2019·0 cites·23 claims
- 4966US8906504B2PigmentsKNIESS HELGE BETTINA·Filed 2006·Granted Dec 9, 2014·1 cites·19 claims
- 5066US5985020APlate-like titanium dioxide reduction pigmentMERCK PATENT GMBH·Filed 1997·Granted Nov 16, 1999·20 cites·11 claims
Showing the top 50 of 74 patent records by PatentIndex Score.
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