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Inventor

Heinrich Helker

Inventor
Krefeld, DE

Overview

4→
Patents
1995–1998
Patent span
Chemistry
Primary field (CPC C)

Patents· 4 as inventor

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

C01Gprimary
C01GCompounds containing metals not covered by subclasses c01d or c01f50%
F27BFurnaces, kilns, ovens or retorts in general50%
PatentTitleYear
5,779,468'Device for supplying gas to rotary kilns'19985,667,759'Method for manufacturing alkali chromates from chromium ore'19975,505,918'Method for manufacturing alkali chromates from chromium ore'19965,431,560'Device for supplying gas to a cylindrical rotary kiln'1995

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1995–1998Patents assigned to BAYER AG (4)· patent assignee history
1995–1998Based in Krefeld, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
BAYER AG41995–1998
Locations
LocationPatentsSpan
Krefeld, DE41995–1998