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Inventor

Antonius Johannes van Hengstum

Inventor
Deventer, NL

Overview

5→
Patents
1992–2013
Patent span
Chemistry
Primary field (CPC C)

Patents· 5 as inventor

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

C07Cprimary
C07CAcyclic or carbocyclic compounds38%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry25%
C10GCracking hydrocarbon oils25%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients13%
PatentTitleYear
RE044175'Process for preparing 4-aminodiphenylamines'20136,465,691'Solvent-free process for preparing thiuram disulfides'20026,140,538'Process for preparing 4-aminodiphenylamines'20005,246,569'Process for the hydrodesulfurization of light hydrocarbon feeds'19935,139,990'Process for the preparation of a resulfided catalyst'1992

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1992–1993Patents assigned to AKZO NV (2)· patent assignee history
1992–2013Based in Deventer, NL· patent location history
2000Patents assigned to FLEXSYS AMERICA LP (1)· patent assignee history
2002Patents assigned to FLEXSYS BV (1)· patent assignee history
2013Patents assigned to GENETTI RALPH ALBERT (1)· patent assignee history
2013Patents assigned to LAMBERS EDWARD ALBERT (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
AKZO NV21992–1993
FLEXSYS AMERICA LP12000
FLEXSYS BV12002
GENETTI RALPH ALBERT12013
LAMBERS EDWARD ALBERT12013
Locations
LocationPatentsSpan
Deventer, NL51992–2013