Alfons Klein

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Duesseldorf, DT

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Patents Grantslast 30 patents

Information Patent Grant
Color photographic material containing a hydroxyindane
- Patent number 4,052,216
- Issue date Oct 4, 1977
- AGFA-Gevaert, A.G.
- Johannes Sobel
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 1,1,3,3-substituted hydroxy indanes
- Patent number 4,045,499
- Issue date Aug 30, 1977
- Bayer Aktiengesellschaft
- Alfons Klein
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Recording materials and image receiving materials for producing cop...
- Patent number 4,013,473
- Issue date Mar 22, 1977
- Agfa-Gevaert N.V.
- Jozef Frans Willems
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 5-isopropyl-3-methyl-phenol
- Patent number 3,968,173
- Issue date Jul 6, 1976
- Bayer Aktiengesellschaft
- Alfons Klein
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the production of 1,1,3,3-substituted hydroxyindanes
- Patent number 3,954,889
- Issue date May 4, 1976
- Bayer Aktiengesellschaft
- Alfons Klein
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Photographic silver halide material which contains color couplers
- Patent number 3,941,601
- Issue date Mar 2, 1976
- AGFA-Gevaert, A.G.
- Willibald Pelz
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY