Inventor

DRAPAL BERND

DE8 patents

⚠️ This page may combine multiple inventors who share the name “DRAPAL BERND”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

DEGUSSA

4 patents

US6063968AMay 16, 2000

Method for the production of trimethylhydroquinone

DEGUSSA42 citations92

US6380437B1Apr 30, 2002

Process for the preparation of unsaturated 4,5-allene ketones, 3,5-diene ketones and the corresponding saturated ketones

DEGUSSA15 citations80

US6103924AAug 15, 2000

Process for the preparation of 2,3,5-trimethylhydroquinone diesters

DEGUSSA7 citations71

US6586635B2Jul 1, 2003

Process for the preparation of unsaturated ketones

DEGUSSA3 citations58

EVONIK OPERATIONS GMBH

2 patents

US10919848B2Feb 16, 2021

Process for preparing methionine

EVONIK OPERATIONS GMBH0 citations58

US12195422B2Jan 14, 2025

Process for the preparation of D,L-methionine

EVONIK OPERATIONS GMBH0 citations54

KOERFER MARTIN

2 patents

US9156782B2Oct 13, 2015

Process for the preparation of methionine

KOERFER MARTIN2 citations57

US9464045B2Oct 11, 2016

Process for the preparation of methionine

KOERFER MARTIN0 citations47