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For the Inventor, By the Inventor

Goslar, Germany

Preussag Aktiengesellschaft Metall


USPTO Granted Patents = 8

Forward Citations = 52

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16 inventors (with patents filed for the assignee):

goldMedal Hans Wilhelm Wieking (2 out of 2 patents)

silverMedal Karl Ehlers (2 out of 2 patents)

bronzeMedal Klaus Janssen (2 out of 3 patents)

4.  Kunibert Hanusch (2 out of 2 patents)

5.  Helmut Winnacker (1 out of 14 patents)

6.  Gunter Bartels (1 out of 1 patent)

7.  Horst Immenroth (1 out of 1 patent)

8.  Gunter Heyer (1 out of 1 patent)

9.  Jurgen Meier (1 out of 1 patent)

10.  Siegfried Frank (1 out of 1 patent)

11.  Wolfang Krajewski (1 out of 1 patent)

12.  Friedhart Knolle (1 out of 1 patent)

13.  Erich Kirsch (1 out of 1 patent)

14.  Heribert Broicher (1 out of 1 patent)

15.  Arthur Zydek (1 out of 1 patent)


8 patents:

1. 4745276 - Device for the detection of fluorescent substances on the surface of the (1988-05-17),
2. 4737351 - Process for the recovery of tin (1988-04-12),
3. 4666686 - Process for the fluid-fluid extraction of gallium, germanium or indium (1987-05-19),
4. 4666347 - Hydraulic conveying of solids (1987-05-19),
5. 4468154 - Method of disposal or temporary storage of waste material (1984-08-28),
6. 4115220 - Process for the preparation of high purity antimony (1978-09-19),
7. 4077799 - Method and apparatus of refining crude cadmium (1978-03-07),
8. 4010937 - Method and apparatus of refining crude cadmium (1977-03-08),
Company Overview
Preussag Aktiengesellschaft Metall is a leading global supplier of metal products and services. With a strong focus on quality and customer satisfaction, we provide a wide range of metal products including steel, aluminum, copper, and alloys. Our expertise in metallurgy and commitment to excellence have made us a trusted partner for industries ranging from automotive to construction.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

8 Patents

#2 in Goslar

#4,424 in Germany

Goslar, DE
Goslar, Germany

Preussag Aktiengesellschaft Metall

Forward Citations = 52

16 inventors:

goldMedal Hans Wilhelm Wieking (2 out of 2 patents)

silverMedal Karl Ehlers (2 out of 2 patents)

bronzeMedal Klaus Janssen (2 out of 3 patents)

4.  Kunibert Hanusch (2 out of 2 patents)

5.  Helmut Winnacker (1 out of 14 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Preussag Aktiengesellschaft Metall. Retrieved from https://idiyas.com/company/preussag-ag-metall

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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