Inventor

Siegfried Kersten

Inventor

Frankenthal, DE

Overview

8→

Patents

1977–1990

Patent span

Chemistry

Primary field (CPC C)

Patents· 8 as inventor

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

C07Cprimary

C07CAcyclic or carbocyclic compounds33%

A01NPreservation of bodies of humans or animals or plants or parts thereof17%

B01DSeparation8%

C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds8%

C07DHeterocyclic compounds8%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium8%

C09CTreatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties8%

C23FNon-mechanical removal of metallic material from surface8%

PatentTitleYear

4,931,466'Crystalline form and its preparation'1990 4,855,140'O-(O-ethyl-S-alkylphosphoryl)-O-(carbamyl)-pyrocatechol derivatives'1989 4,788,324'Preparation of o-(1-methoxy-2-chloro)-ethoxyphenyl N-methylcarbamate'1988 4,537,986'Preparation of pyrocatechol methylcarbamate'1985 4,348,240'Process for deactivating soluble metal cations in iron oxide pigments'1982 4,200,501'Silicate fouling control during dihydric alcohol distillation'1980 4,049,709'Vinyl-substituted sulfamic acid halides'1977 4,003,938'Manufacture of aliphatic isocyanates'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1990Patents assigned to BASF AG (6)· patent assignee history

1977Based in Ludwigshafen, DE· patent location history

1980–1982Patents assigned to BASF WYANDOTTE CORP (2)· patent assignee history

1980Based in Trenton, MI, US· patent location history

1982–1990Based in Frankenthal, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BASF AG	6	1977–1990
BASF WYANDOTTE CORP	2	1980–1982

Locations

Location	Patents	Span
Frankenthal, DE	5	1982–1990
Ludwigshafen, DE	2	1977
Trenton, MI, US	1	1980