Forward Citations = 54

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12 inventors (with patents filed for the assignee):

Hans-Joachim Koschlig (4 out of 4 patents)

Helmut Schmidt (1 out of 118 patents)

Fred Brunk (1 out of 4 patents)

4. Lothar Brandau (1 out of 1 patent)

5. Frank Hutter (1 out of 2 patents)

6. Wilhelm Stewen (1 out of 7 patents)

7. Klaus Wessiepe (1 out of 6 patents)

8. Wolfgang Becker (1 out of 1 patent)

9. Engelbert Overkott (1 out of 1 patent)

10. Willi Kunkel (1 out of 1 patent)

11. Martin Heumuller (1 out of 1 patent)

12. Walter Hartmann (1 out of 1 patent)

6 patents: Sort by Forward Citations

1. 5322826 - Refractory material (1994-06-21),

2. 5137602 - Heating chamber for a coke oven and method of heating a coke oven (1992-08-11),

3. 4917772 - Oven door assembly (1990-04-17),

4. 4916106 - Supported catalyst and process for its production for the reduction of (1990-04-10),

5. 4866015 - Silica brick and process for producing same (1989-09-12),

6. 4833115 - Ceramic honeycombed elongated catalyst carrier and method for production (1989-05-23),

Company Overview

Dr. C. Otto Feuerfest GmbH is a leading manufacturer of refractory products for industrial applications. With a history dating back to 1904, the company has established itself as a reliable partner for clients in various industries. Their high-quality products are used in furnaces, kilns, and other high-temperature processes to ensure optimal performance and long-lasting durability. Dr. C. Otto Feuerfest GmbH is committed to innovation and continuous improvement to meet the evolving needs of their customers.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

6 Patents

#16 in Bochum

#5,405 in Germany

Bochum, Germany

Dr. C. Otto Feuerfest Gmbh

Forward Citations = 54

12 inventors:

Hans-Joachim Koschlig (4 out of 4 patents)

Helmut Schmidt (1 out of 118 patents)

Fred Brunk (1 out of 4 patents)

4. Lothar Brandau (1 out of 1 patent)

5. Frank Hutter (1 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dr. C. Otto Feuerfest Gmbh. Retrieved from https://idiyas.com/company/dr-c-otto-feuerfest

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]