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For the Inventor, By the Inventor

Leverkusen, Germany

Hans-Peter Kuhlthau

This inventor holds 23 USPTO granted patents, primarily in Cationic Dyestuffs. Top assignee: Bayer Aktiengesellschaft. Active years: 1976-1986.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hans-Peter Kuhlthau. Retrieved from https://idiyas.com/inventor/hans-peter-kuhlthau

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

USPTO Granted Patents = 23

% Patents Active = 100.0

Average Co-Inventor Count = 1.4

ph-index = 5

Forward Citations = 79(Granted Patents)


Company Filing History:

goldMedal23 out of 12,268 
 
Bayer Aktiengesellschaft
 patents

Years Active: 1976-1986

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Areas of Expertise:
Cationic Dyestuffs
Methine Dyestuffs
Polyazo Dyestuffs
Aminotriazoles
Alkylarylhydrazone
Triazole-Azo-Pheynl
Benzthiazole
Pressure-Sensitive Material
Transfer Printing
Basic Azo Dyestuffs
Synthetic Fiber Dyeing
Triaryl-Methane
23 patents (USPTO):Explore Patents
1. 4598151 - Cationic dyestuffs, a process for their preparation, and their use for (1986-07-01),
2. 4542224 - Process for preparing cationic methine dyestuffs (1985-09-17),
3. 4542223 - Process for the preparation of cationic methine dyestuffs (1985-09-17),
4. 4513142 - Preparation of cationic methine dyestuffs (1985-04-23),
5. 4400321 - Process for the preparation of solutions of cationic polyazo dyestuffs (1983-08-23),
6. 4392998 - One pot diazotization, coupling and quaternization of aminotriazoles (1983-07-12),
7. 4376728 - Process for the preparation of cationic alkylarylhydrazone dyestuffs and (1983-03-15),
8. 4294756 - Cationic dyestuffs (1981-10-13),
9. 4292238 - Alkylation of benzthiazole-azo-phenylamine dyestuffs (1981-09-29),
10. 4252716 - Benzthiazolyl-azo-indole basic dyestuffs (1981-02-24),
11. 4211436 - Pressure-sensitive recording material (1980-07-08),
12. 4203722 - Transfer printing process with naphtholactam dyes (1980-05-20),
13. 4185151 - Cationic dyestuffs (1980-01-22),
14. 4115413 - Triaryl-methane dyestuffs (1978-09-19),
15. 4051117 - Triazole-azo-phenyl cationic dyestuffs (1977-09-27),

Title: Hans-Peter Kuhlthau: A Pioneer in Cationic Dyestuffs

Introduction

Hans-Peter Kuhlthau, based in Leverkusen, Germany, is an accomplished inventor with a remarkable portfolio of 23 patents. His innovative work primarily focuses on cationic dyestuffs and their applications in various industries. Kuhlthau's contributions have significantly advanced the field of dye chemistry, making him a key figure at Bayer Aktiengesellschaft, a leading global company in the science and technology sector.

Latest Patents

Among Hans-Peter Kuhlthau's most recent patents is a process for the preparation of cationic dyestuffs. This invention includes dyestuffs of the formula where R represents hydrogen or optionally substituted alkyl, advancing the method of producing such compounds. Additionally, he has developed a process for preparing cationic methine dyestuffs, further contributing to the innovative techniques in dye formulation and application.

Career Highlights

Throughout his career at Bayer Aktiengesellschaft, Kuhlthau has consistently showcased his expertise and commitment to innovation. His contributions have not only enhanced the company's product portfolio but have also driven improvements in the dye manufacturing process, resulting in more efficient and effective solutions for various applications.

Collaborations

Hans-Peter Kuhlthau has collaborated with notable colleagues such as Roderich Raue and Hermann Beecken. Together, they have worked on various projects and patents, leveraging their collective knowledge and expertise to push the boundaries of dye chemistry and innovation.

Conclusion

In summary, Hans-Peter Kuhlthau stands out as a prominent inventor in the field of cationic dyestuffs. His extensive patent portfolio and collaborations highlight his dedication to advancing dye technology at Bayer Aktiengesellschaft. Kuhlthau's innovative approaches continue to inspire future developments in the chemical industry.

Profile summary based on public USPTO records.
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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