Inventor
FRANZ GERHARD
DE27 patents
⚠️ This page may combine multiple inventors who share the name “FRANZ GERHARD”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAYER AG
12 patentsUS4676838AJun 30, 1987
Lamellar iron oxide pigments, a process for the production thereof and the use thereof
BAYER AG47 citations92
US4404254ASep 13, 1983
Production of lamellar iron oxide pigments
BAYER AG34 citations92
US4681637AJul 21, 1987
Process for the production of yellow-brown zinc ferrite pigments
BAYER AG22 citations78
US5075091ADec 24, 1991
Process for the preparation of silicon nitride
BAYER AG7 citations72
US5030434AJul 9, 1991
Silicon nitride powders with improved surface properties and processes for their preparation
BAYER AG8 citations72
US4948762AAug 14, 1990
Process for the preparation of finely divided carbides and nitrides from ceramic precursor-compounds
BAYER AG14 citations72
US5039632AAug 13, 1991
SI C powder, a process for its production and its use
BAYER AG6 citations71
US4980322ADec 25, 1990
Sinterable SI3 N4 powders containing sintering additives and a process for their preparation
BAYER AG7 citations70
US4983371AJan 8, 1991
Silicon nitride powder of low oxygen content
BAYER AG4 citations61
US4798714AJan 17, 1989
Process for the preparation of silicon nitride low in carbon content
BAYER AG4 citations61
US4845060AJul 4, 1989
Sinterable Si3 N4 powder and a process for its preparation
BAYER AG3 citations59
US5066473ANov 19, 1991
Silicon nitride powders of low isoelectric point and processes for their production
BAYER AG1 citations51
HUELS CHEMISCHE WERKE AG
6 patentsUS4335018AJun 15, 1982
Catalyst for the production of maleic anhydride
HUELS CHEMISCHE WERKE AG14 citations73
US4126748ANov 21, 1978
Process for the production of carboxylic acid esters by catalytic oxidation of alcohols
HUELS CHEMISCHE WERKE AG9 citations67
US4268448AMay 19, 1981
Process for the production of maleic anhydride
HUELS CHEMISCHE WERKE AG3 citations62
US5869736AFeb 9, 1999
Oxidation in the Witten-Hercules process for preparing dimethyl terephthalate
HUELS CHEMISCHE WERKE AG3 citations59
US4367362AJan 4, 1983
Process for the isomerization of N-alkenes
HUELS CHEMISCHE WERKE AG4 citations59
US4250119AFeb 10, 1981
Process for the production of acetone from isobutyraldehyde
HUELS CHEMISCHE WERKE AG3 citations56