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For the Inventor, By the Inventor

Cologne, Germany

Pfeifer Langen


USPTO Granted Patents = 13


Forward Citations = 182

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14 inventors (with patents filed for the assignee):

goldMedal Dieter Schwengers (9 out of 10 patents)

silverMedal Herta Benecke (3 out of 3 patents)

bronzeMedal Ingrid Keller (2 out of 2 patents)

4.  Udo Breithaupt (2 out of 2 patents)

5.  Hermann Sahm (1 out of 43 patents)

6.  Robert Klemps (1 out of 1 patent)

7.  Siegfried Schoberth (1 out of 1 patent)

8.  Werner Swyzen (1 out of 1 patent)

9.  Hermann Hippchen (1 out of 1 patent)

10.  Hans-Georg Schneider (1 out of 1 patent)

11.  Renate Schwingeler (1 out of 1 patent)

12.  Cornelis Bos (1 out of 1 patent)

13.  Erik Andersen (1 out of 1 patent)

14.  Arnold Langen (1 out of 1 patent)

15.  Thomas Huwer (1 patent)


13 patents:

1. 4935360 - Process for the microbial anaerobic production of acetic acid (1990-06-19),
2. 4927756 - Water soluble iron dextran and a process for its manufacture (1990-05-22),
3. 4910142 - Cell culture microcarrier, method for preparing same and use thereof for (1990-03-20),
4. 4824946 - Cell culture microcarrier, method for preparing same and use thereof for (1989-04-25),
5. 4749695 - Water soluble iron dextran and a process for its manufacture (1988-06-07),
6. 4693974 - Processes for producing leucrose (1987-09-15),
7. 4673643 - Process for the manufacture of iso-malto-oligosaccharide monovalent (1987-06-16),
8. 4651715 - Method for an equipment for making dry products from sugar syrup (1987-03-24),
9. 4649058 - Gluco-oligosaccharide mixture and a process for its manufacture (1987-03-10),
10. 4627880 - Unprocessed complete cane sugar and method of producing it (1986-12-09),
11. 4154623 - Method of preparing refined starch hydrolysates from starch-containing (1979-05-15),
12. 4111714 - Process for obtaining amino acids from the raw juices of sugar (1978-09-05),
13. 3939281 - Extraction of fat from starch-containing vegetable matter (1976-02-17),
Company Overview
Pfeifer Langen is a prominent company based in Cologne, Germany, specializing in the development and manufacturing of high-quality industrial products and solutions. The organization focuses on innovative technologies in various sectors, including automotive engineering and manufacturing processes. With a commitment to excellence, Pfeifer Langen leverages advanced research to enhance product performance and efficiency, catering to a diverse clientele across multiple industries while maintaining a strong presence in the European market.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

13 Patents

#38 in Cologne

#3,077 in Germany

#44,988 in the World

Cologne, DE
Cologne, Germany

Pfeifer Langen

Forward Citations = 182

14 inventors:

goldMedal Dieter Schwengers (9 out of 10 patents)

silverMedal Herta Benecke (3 out of 3 patents)

bronzeMedal Ingrid Keller (2 out of 2 patents)

4.  Udo Breithaupt (2 out of 2 patents)

5.  Hermann Sahm (1 out of 43 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Pfeifer Langen. Retrieved from https://idiyas.com/company/pfeifer-langen

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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