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Inventor

Ralf Maassen

Inventor
Erftstadt, DE

Overview

6→
Patents
2001–2017
Patent span
Chemistry
Primary field (CPC C)

Patents· 6 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

B01Jprimary
B01JChemical or physical processes, e.g. catalysis or colloid chemistry40%
C01BNon-metallic elements40%
C07CAcyclic or carbocyclic compounds20%
PatentTitleYear
9,649,615'Reactor and process for preparing hydrogen sulphide'20179,630,843'Reactor and process for preparing hydrogen sulphide'20179,440,208'Reactor and process for preparing hydrogen sulphide'20169,421,511'Reactor and process for preparing hydrogen sulphide'20166,410,798'Process for the preparation of 2,3,5-trimethy1-p-Benzoquinone'20026,262,311'Process for the preparation of 2,3,5-trimethyl-p-benzoquinone'2001

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2001–2002Patents assigned to DEGUSSA (2)· patent assignee history
2001–2002Based in Hanau, DE· patent location history
2016–2017Patents assigned to EVONIK DEGUSSA GMBH (4)· patent assignee history
2016Patents assigned to CHEUNG CHIU KEE (2)· patent assignee history
2016Patents assigned to FINKELDEI CASPAR-HEINRICH (2)· patent assignee history
2016Patents assigned to KOERFER MARTIN (2)· patent assignee history
2016–2017Based in Erftstadt, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
EVONIK DEGUSSA GMBH42016–2017
CHEUNG CHIU KEE22016
DEGUSSA22001–2002
FINKELDEI CASPAR-HEINRICH22016
KOERFER MARTIN22016
Locations
LocationPatentsSpan
Erftstadt, DE42016–2017
Hanau, DE22001–2002