Inventor
RITTER GEBHARD
CH18 patents
⚠️ This page may combine multiple inventors who share the name “RITTER GEBHARD”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DEGUSSA
5 patentsUS5026925AJun 25, 1991
Method of producing catechol and hydroquinone
DEGUSSA5 citations60
US4751332AJun 14, 1988
Process for the production of trihydroxy-and/or alkoxy-hydroxybenzenes
DEGUSSA2 citations60
US4751333AJun 14, 1988
Method for the preparation of trihydroxybenzenes
DEGUSSA3 citations60
US4825011AApr 25, 1989
Method of preparing substituted dihydroxy-benzenes
DEGUSSA0 citations50
US4762953AAug 9, 1988
Method for the preparation of substituted trihydroxybenzenes
DEGUSSA0 citations49
SICPA HOLDING SA
4 patentsUS10166808B2Jan 1, 2019
Optically variable security threads and stripes
SICPA HOLDING SA2 citations73
US11712917B2Aug 1, 2023
Security document and manufacturing method thereof
SICPA HOLDING SA0 citations42
US10023000B2Jul 17, 2018
Security threads and stripes
SICPA HOLDING SA0 citations41
US10166810B2Jan 1, 2019
Optically variable magnetic security threads and stripes
SICPA HOLDING SA0 citations33
HOECHST AG
3 patentsUS4776987AOct 11, 1988
Carrier-supported catalyst and process for making mono-carboxylic anhydrides
HOECHST AG23 citations81
US4906415AMar 6, 1990
Carrier-supported catalyst and process for making monocarboxylic anhydrides
HOECHST AG6 citations73
US4657884AApr 14, 1987
Carrier-supported catalyst for making monocarboxylic anhydrides
HOECHST AG13 citations73