% Expired Patents = 66.7

Trademarks = 1

Forward Citations = 7

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11 inventors (with patents filed for the assignee):

Wolfgang Pfleiderer (3 out of 32 patents)

Markus Ott (2 out of 2 patents)

Klaus-Peter Stengele (1 out of 8 patents)

4. Norbert Kern (1 out of 3 patents)

5. Sigrid Buehler (1 out of 1 patent)

6. Sigrid Bühler (1 out of 1 patent)

7. Heiner Giegrich (1 out of 1 patent)

8. Sigrid Bühler (1 out of 1 patent)

9. Heinrich Giegrich (1 out of 1 patent)

10. Erwin O Kiesewetter (1 out of 4 patents)

11. Klaus Peter Stengele (1 out of 1 patent)

6 patents: Sort by Forward Citations

1. 8445734 - Photolabile protective groups for improved processes to prepare oligonucleotide arrays (2013-05-21),

2. 7759513 - Photolabile protective groups for improved processes to prepare oligonucleotide arrays (2010-07-20),

3. 6750335 - Nucleoside derivatives with photolabile protective groups (2004-06-15),

4. 6552182 - Method for photolytically deprotecting immobilized nucleoside derivatives, especially in the production of DNA chips (2003-04-22),

5. 6486348 - Method for producing 1-methyl-3-nitroguanidine (2002-11-26),

6. 5938907 - Method for recovering guanidine salts (1999-08-17),

Company Overview

Nigu Chemie GmbH is a leading chemical manufacturing company based in Germany. We specialize in producing high-quality chemical products for various industries, such as agriculture, pharmaceuticals, and environmental services. With a focus on innovation and sustainability, we strive to provide our customers with solutions that meet their specific needs and contribute to a more sustainable future. Our dedicated team of experts ensures that all our products meet the highest standards of quality and safety. Visit our website to learn more about our products and services.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

6 Patents

#6 in Waldkraiburg

#5,405 in Germany

Waldkraiburg, Germany

Nigu Chemie Gmbh

Forward Citations = 7

11 inventors:

Wolfgang Pfleiderer (3 out of 32 patents)

Markus Ott (2 out of 2 patents)

Klaus-Peter Stengele (1 out of 8 patents)

4. Norbert Kern (1 out of 3 patents)

5. Sigrid Buehler (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nigu Chemie Gmbh. Retrieved from https://idiyas.com/company/nigu-chemie

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]