Inventor
PENNINGER STEFAN
DE13 patents
⚠️ This page may combine multiple inventors who share the name “PENNINGER STEFAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAYER AG
12 patentsUS4480110AOct 30, 1984
Process for the preparation of urethanes
BAYER AG31 citations92
US4879409ANov 7, 1989
Cycloaliphatic diisocyanates, optionally in the form of isomeric mixtures and a process for their preparation
BAYER AG7 citations73
US4786751ANov 22, 1988
Dissocyanates, diisocyanate mixtures and a process for their production
BAYER AG7 citations73
US4675437AJun 23, 1987
Cycloaliphatic triisocyanates
BAYER AG8 citations73
US4603189AJul 29, 1986
Triisocyanates and a process for their preparation
BAYER AG6 citations73
US5552507ASep 3, 1996
Diisocyanates and processes for their production and use
BAYER AG6 citations72
US5399736AMar 21, 1995
Process for the preparation of highly pure aromatic diurethanes and/or polyurethanes
BAYER AG7 citations72
US4879408ANov 7, 1989
Cycloaliphatic diisocyanates optionally in the form of isomer mixtures and a process for their production
BAYER AG6 citations62
US4720582AJan 19, 1988
Diamines and a process for their production
BAYER AG2 citations62
US4593117AJun 3, 1986
Process for the preparation of N- and O-substituted diurethanes and/or polyurethanes
BAYER AG5 citations60
US5663439ASep 2, 1997
Process for the preparation of toluidines
BAYER AG0 citations51
US6486346B1Nov 26, 2002
Process for the preparation of durene diisocyanate
BAYER AG1 citations50