Inventor · disambiguated record
David G. Leppard
Also filed as: LEPPARD DAVID · LEPPARD DAVID G · LEPPARD DAVID GEORGE · LUISOLI RETO
77 granted patents·7 pending applications·2,069 citations·filing 1977–2010
99Inventor score
Top patents by PatentIndex Score
84 records- 0199US5574166ACrystalline form of 2-(2-hydroxy-3-α-cumyl-5-tert-octylphenyl)-2H-benzotriazoleCIBA GEIGY CORP·Filed 1995·Granted Nov 12, 1996·95 cites·5 claims
- 0298US5240975ALiquid substituted 2H-benzotriazole mixtures, stabilized compositionsCIBA GEIGY CORP·Filed 1991·Granted Aug 31, 1993·117 cites·6 claims
- 0397US6020528AAlkylphenylbisacylphosphine oxides and photoinitiator mixturesCIBA SC HOLDING AG·Filed 1997·Granted Feb 1, 2000·134 cites·5 claims
- 0497US5607987A2-(2-hydroxy-3-α cumyl-5-tert nonyl or dodecyl phenyl)-2H- Benzotriazole UV AbsorbersCIBA GEIGY CORP·Filed 1996·Granted Mar 4, 1997·78 cites·1 claims
- 0596US5563242AElectro coat/base coat/clear coat finishes stabilized with soluble and thermally stable benzotriazole UV absorbersCIBA GEIGY CORP·Filed 1995·Granted Oct 8, 1996·76 cites·13 claims
- 0696US5554760A2-(2-hydroxy-3-α-cumyl-5-nonylor 5-dodecylphenyl)-2H-benzotriazoleCIBA GEIGY CORP·Filed 1995·Granted Sep 10, 1996·66 cites·2 claims
- 0796US5534559ADaylight curing compositions containing bisacylphosphine oxide photoinitiatorsCIBA GEIGY CORP·Filed 1995·Granted Jul 9, 1996·139 cites·19 claims
- 0895US6048660ANon-volatile phenylglyoxalic estersCIBA SC HOLDING AG·Filed 1998·Granted Apr 11, 2000·82 cites·15 claims
- 0995US5998116AColor-photographic recording materialCIBA SC HOLDING AG·Filed 1997·Granted Dec 7, 1999·36 cites·14 claims
- 1094US5509957AInk compositionsCIBA GEIGY CORP·Filed 1993·Granted Apr 23, 1996·68 cites·11 claims
- 1193US5399770AAlkylbisacylphosphine oxidesCIBA GEIGY CORP·Filed 1992·Granted Mar 21, 1995·76 cites·10 claims
- 1293US5300414APhotographic material containing UV absorberCIBA GEIGY CORP·Filed 1992·Granted Apr 5, 1994·58 cites·22 claims
- 1392US5942290AMolecular complex compounds of acylphosphine oxide and α-hydroxy ketones as photoinitiatorsCIBA SC HOLDING AG·Filed 1997·Granted Aug 24, 1999·101 cites·17 claims
- 1492US4268593ARecording material for color photographyCIBA GEIGY AG·Filed 1979·Granted May 19, 1981·27 cites·8 claims
- 1591US7294714B2Highly compatible hydroxyphenyltriazine UV-absorbersCIBA SC HOLDING AG·Filed 2006·Granted Nov 13, 2007·9 cites·14 claims
- 1691US5472992APhotopolymerizable compositions containing an alkylbisacylphosphine oxideCIBA GEIGY CORP·Filed 1994·Granted Dec 5, 1995·44 cites·15 claims
- 1791US5089050AInks containing a water soluble compound as a stabilizer particularly for ink jet printingCIBA GEIGY CORP·Filed 1991·Granted Feb 18, 1992·72 cites·6 claims
- 1890US4452884AColor-photographic recording materialCIBA GEIGY AG·Filed 1982·Granted Jun 5, 1984·24 cites·9 claims
- 1989US5965776AAlkoxyphenyl-substituted bisacylphosphine oxidesCIBA SC HOLDING AG·Filed 1995·Granted Oct 12, 1999·43 cites·7 claims
- 2089US5767169APhotopolymerizable compositions comprising alkoxyphenyl-substituted bisacylphosphine oxidesCIBA SC HOLDING AG·Filed 1996·Granted Jun 16, 1998·58 cites·5 claims
- 2188US5261953AInksCIBA GEIGY CORP·Filed 1991·Granted Nov 16, 1993·58 cites·4 claims
- 2287US4973701ALiquid substituted 2H-benzotriazole mixtures, stabilized compositions and processes for preparing the liquid mixturesCIBA GEIGY CORP·Filed 1988·Granted Nov 27, 1990·25 cites·23 claims
- 2386US5723512ADimeric bisacylphosphines, oxides and sulfidesCIBA SC HOLDING AG·Filed 1996·Granted Mar 3, 1998·40 cites·10 claims
- 2486US5298380APhotographic material which contains a UV absoberCIBA GEIGY CORP·Filed 1992·Granted Mar 29, 1994·15 cites·11 claims
- 2585US7265171B2Transparent polymer articles of low thicknessCIBA SC HOLDING AG·Filed 2006·Granted Sep 4, 2007·9 cites·13 claims
- 2685US5071993ABis(dibenzoxazoyl)thiophene fluorescent brightenersCIBA GEIGY CORP·Filed 1989·Granted Dec 10, 1991·17 cites·7 claims
- 2782US7332105B2Synergistic UV absorber combinationCIBA SC HOLDING AG·Filed 2003·Granted Feb 19, 2008·15 cites·16 claims
- 2882US4517283AColor-photographic recording materialCIBA GEIGY AG·Filed 1983·Granted May 14, 1985·18 cites·23 claims
- 2981US4584265AColor-photographic recording materialCIBA GEIGY AG·Filed 1985·Granted Apr 22, 1986·14 cites·13 claims
- 3080US6284813B1Alkylphenylbisacylphosphine oxides and photoinitiator mixturesCIBA SC HOLDING AG·Filed 1998·Granted Sep 4, 2001·33 cites·4 claims
- 3180US5364749APhotographic material containing UV absorberCIBA GEIGY CORP·Filed 1992·Granted Nov 15, 1994·45 cites·42 claims
- 3279US5410048AS-triazine UV absorbersCIBA GEIGY CORP·Filed 1994·Granted Apr 25, 1995·9 cites·1 claims
- 3377US4465765AColorphotographic recording materialCIBA GEIGY·Filed 1983·Granted Aug 14, 1984·15 cites·9 claims
- 3476US5538840APhotographic recording material containing a UV absorberCIBA GEIGY CORP·Filed 1995·Granted Jul 23, 1996·35 cites·17 claims
- 3574US7214742B22-hydroxyphenyl-s-triazine crosslinkers for polymer networksCIBA SC HOLDING AG·Filed 2002·Granted May 8, 2007·13 cites·14 claims
- 3674US5721292AAcylphosphine oxidesCIBA SC HOLDING AG·Filed 1995·Granted Feb 24, 1998·18 cites·21 claims
- 3773US5869588APolymeric compounds derived from 2-hydroxy-phenyl-s-triazines substituted with ethylenically unsaturated moietiesCIBA SC HOLDING AG·Filed 1997·Granted Feb 9, 1999·27 cites·7 claims
- 3873US4518679AColor-photographic recording materialCIBA GEIGY AG·Filed 1983·Granted May 21, 1985·8 cites·14 claims
- 3972US7166653B2Transparent polymer articles of low thicknessCIBA SC HOLDING AG·Filed 2003·Granted Jan 23, 2007·4 cites·13 claims
- 4071US6361925B1Photoinitiator mixtures and compositions with alkylphenylbisacylphosphine oxidesCIBA SC HOLDING AG·Filed 2001·Granted Mar 26, 2002·28 cites·9 claims
- 4170US6888031B1Process for the preparation of acylphosphines, acyl oxides and acyl sulfidesCIBA SC HOLDING AG·Filed 1999·Granted May 3, 2005·14 cites·13 claims
- 4270US4629682ARecording material for color photographyCIBA GEIGY AG·Filed 1985·Granted Dec 16, 1986·9 cites·17 claims
- 4370US4558131AColor-photographic recording materialCIBA GEIGY AG·Filed 1983·Granted Dec 10, 1985·7 cites·4 claims
- 4469US5411847AColor-photographic recording materialCIBA GEIGY CORP·Filed 1993·Granted May 2, 1995·9 cites·8 claims
- 4568US2009291289A1Transparent polymer articles of low thicknessLEPPARD DAVID GEORGE·Filed 2009·Application pending·0 cites
- 4667US4996326ANovel 2-(2-hydroxyphenyl)-benzotriazole derivatives, substituted by branched long chain alkyl groups containing ester moietiesCIBA GEIGY CORP·Filed 1990·Granted Feb 26, 1991·14 cites·4 claims
- 4767US4465757ARecording material for color photographyCIBA GEIGY·Filed 1983·Granted Aug 14, 1984·6 cites·5 claims
- 4865US5672704A2-Hydroxyphenyl-s-Triazines substituted with ethylenically unsaturated moietiesCIBA GEIGY CORP·Filed 1995·Granted Sep 30, 1997·19 cites·4 claims
- 4964US5399782ABenzoyl-substituted phosphabicycloalkanes and phosphabicycloalkanesulfides as photoinitiatorsCIBA GEIGY CORP·Filed 1993·Granted Mar 21, 1995·9 cites·7 claims
- 5062US5095062AStabilized compositions containing liquid substituted 2H-benzotriazole mixturesCIBA GEIGY CORP·Filed 1990·Granted Mar 10, 1992·9 cites·7 claims
Showing the top 50 of 84 patent records by PatentIndex Score.
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