DL

David G. Leppard

CI Ciba-Geigy: 52 patents #19 of 2,867Top 1%
CC Ciba Specialty Chemicals: 22 patents #29 of 1,233Top 3%
CA Ciba-Geigy A.G.: 2 patents #1 of 21Top 5%
📍 Marly, CH: #1 of 75 inventorsTop 2%
Overall (All Time): #25,151 of 4,157,543Top 1%
76
Patents All Time

Issued Patents All Time

Showing 1–25 of 76 patents

Patent #TitleCo-InventorsDate
7638626 Highly compatible hydroxyphenyltriazine UV-absorbers Dario Lazzari, Massimiliano Sala, Manuele Vitali, Graziano Zagnoni, Gianluca Ferri 2009-12-29
7332105 Synergistic UV absorber combination Adalbert Braig, Frederique Wendeborn 2008-02-19
7294714 Highly compatible hydroxyphenyltriazine UV-absorbers Dario Lazzari, Massimiliano Sala, Manuele Vitali, Graziano Zagnoni, Gianluca Ferri 2007-11-13
7265171 Transparent polymer articles of low thickness Francois Gugumus, Michela Bonora 2007-09-04
7214830 Process for the preparation of acylphosphines, acyl oxides and acyl sulfides Eugen Eichenberger, René Kaeser, Gebhard Hug, Urs Schwendimann 2007-05-08
7214742 2-hydroxyphenyl-s-triazine crosslinkers for polymer networks Thomas Bolle, Andreas Valet, Stephen Mark Andrews, Ramanathan Ravichandran, Markus Grob +1 more 2007-05-08
7166653 Transparent polymer articles of low thickness Francois Gugumus, Michela Bonora 2007-01-23
7094931 Process for the preparation of acylphosphines, acyl oxides and acyl sulfides Eugen Eichenberger, René Kaeser, Gebhard Hug, Urs Schwendimann 2006-08-22
7060425 Color photographic material Suruliappa Jeganathan, Stéphan Biry, Peter Nesvadba 2006-06-13
6888031 Process for the preparation of acylphosphines, acyl oxides and acyl sulfides Eugen Eichenberger, René Kaeser, Gebhard Hug, Urs Schwendimann 2005-05-03
6495622 Dimeric light stabilizers for polyolefines and polyolefine copolymers Vien Van Toan, Roland A. E. Winter, Michela Bonora 2002-12-17
6361925 Photoinitiator mixtures and compositions with alkylphenylbisacylphosphine oxides Manfred Kohler, Andreas Valet 2002-03-26
6284813 Alkylphenylbisacylphosphine oxides and photoinitiator mixtures Manfred Kohler, Andreas Valet 2001-09-04
6048660 Non-volatile phenylglyoxalic esters Manfred Kohler 2000-04-11
6020528 Alkylphenylbisacylphosphine oxides and photoinitiator mixtures Manfred Kohler, Andreas Valet 2000-02-01
5998116 Color-photographic recording material Pascal Hayoz, Christophe Bulliard 1999-12-07
5965776 Alkoxyphenyl-substituted bisacylphosphine oxides Manfred Kohler 1999-10-12
5942290 Molecular complex compounds of acylphosphine oxide and .alpha.-hydroxy ketones as photoinitiators Thomas L. James, Nils Hock, Manfred Kohler, Ronald Salathe 1999-08-24
5869588 Polymeric compounds derived from 2-hydroxy-phenyl-s-triazines substituted with ethylenically unsaturated moieties Vien Van Toan, Gerhard Rytz, Norbert Wurms, Pascal Hayoz 1999-02-09
5817887 Color-photographic recording material Hugh Stephen Laver 1998-10-06
5767169 Photopolymerizable compositions comprising alkoxyphenyl-substituted bisacylphosphine oxides Manfred Kohler 1998-06-16
5723512 Dimeric bisacylphosphines, oxides and sulfides Manfred Kohler 1998-03-03
5721292 Acylphosphine oxides Manfred Kohler, Gebhard Hug 1998-02-24
5672704 2-Hydroxyphenyl-s-Triazines substituted with ethylenically unsaturated moieties Vien Van Toan, Gerhard Rytz, Norbert Wurms, Pascal Hayoz 1997-09-30
5607987 2-(2-hydroxy-3-.alpha. cumyl-5-tert nonyl or dodecyl phenyl)-2H- Benzotriazole UV Absorbers Roland A. E. Winter, Ramanathan Ravichandran, Mark S. Holt, Volker H. von Ahn, Joseph E. Babiarz 1997-03-04