Inventor
FRANK KARL
13 patents
⚠️ This page may combine multiple inventors who share the name “FRANK KARL”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AGFA GEVAERT AG
9 patentsUS3994730ANov 30, 1976
Photographic color developer mixture
AGFA GEVAERT AG23 citations77
US4310621AJan 12, 1982
Photosensitive photographic material, a process for the production of photographic images, development baths and new hydroquinones
AGFA GEVAERT AG9 citations73
US4923785AMay 8, 1990
Bleaching bath concentrate
AGFA GEVAERT AG8 citations72
US4267263AMay 12, 1981
Use of β-aminoethyl carbamic acid for producing photographic baths and developer compositions
AGFA GEVAERT AG2 citations62
US4229521AOct 21, 1980
Method of processing photographic materials
AGFA GEVAERT AG3 citations62
US4847179AJul 11, 1989
Photographic dye diffusion transfer process and color photographic recording material suitable for this process
AGFA GEVAERT AG3 citations61
US4609616ASep 2, 1986
Bath composition for bleaching photographic recording materials and bleaching process
AGFA GEVAERT AG3 citations61
US4142895AMar 6, 1979
Photographic color developer composition
AGFA GEVAERT AG3 citations59
US4174968ANov 20, 1979
Photographic reversal process without second exposure
AGFA GEVAERT AG1 citations51