Inventor

LEPPARD DAVID G

CH52 patents

⚠️ This page may combine multiple inventors who share the name “LEPPARD DAVID G”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

LEPPARD DAVID G

CIBA GEIGY CORP

Daylight curing compositions containing bisacylphosphine oxide photoinitiators

2-(2-hydroxy-3-α cumyl-5-tert nonyl or dodecyl phenyl)-2H- Benzotriazole UV Absorbers

Crystalline form of 2-(2-hydroxy-3-α-cumyl-5-tert-octylphenyl)-2H-benzotriazole

Electro coat/base coat/clear coat finishes stabilized with soluble and thermally stable benzotriazole UV absorbers

2-(2-hydroxy-3-α-cumyl-5-nonylor 5-dodecylphenyl)-2H-benzotriazole

Photopolymerizable compositions containing an alkylbisacylphosphine oxide

Alkylbisacylphosphine oxides

Photographic material containing UV absorber

Inks

Inks containing a water soluble compound as a stabilizer particularly for ink jet printing

Ink compositions

Photographic material containing UV absorber

Photographic recording material containing a UV absorber

S-triazine UV absorbers

Photographic material which contains a UV absober

Bis(dibenzoxazoyl)thiophene fluorescent brighteners

Novel 2-(2-hydroxyphenyl)-benzotriazole derivatives, substituted by branched long chain alkyl groups containing ester moieties

Color-photographic recording material

Benzoyl-substituted phosphabicycloalkanes and phosphabicycloalkanesulfides as photoinitiators

Phenolic benzothiazole derivatives and their use as corrosion inhibitors

Phenolic benzothiazole derivatives and their use as corrosion inhibitors

Triazine compounds as UV absorbers for photographic material

Phenylthiophenyl ketones

Color-photographic recording material

Phenolic benzothiazole derivatives and their use as corrosion inhibitors

Process for stabilizing magenta couplers and the corresponding image dyes in photographic materials

Processes for preparing phenolic benzothiazole derivatives

CIBA GEIGY AG

Color-photographic recording material

Recording material for color photography

Color photographic materials comprising phenolic thiane derivatives as light and thermal oxidation stabilizers

Stabilizers for color photography recording materials

Recording material for color photography

Color-photographic recording material

Color-photographic recording material

Color-photographic recording material

Color-photographic recording material

Color-photographic recording material

Color photographic materials containing stabilizers

Process for stabilizing photographic material containing magenta coupler

Stabilizers for color photography recording materials

Stabilizers for color photographic recording materials

Phenolic thiane derivatives

Color-photographic recording material

Dibenzoxaphosphorin compounds

Photographic recording material

Silver halide color photographic material containing yellow coupler

Stabilizers for color photographic recording materials

CIBA GEIGY

Colorphotographic recording material

Recording material for color photography

CIBA SC HOLDING AG

Dimeric bisacylphosphines, oxides and sulfides