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For the Inventor, By the Inventor

Ludwigshafen, Germany

Claus-Ulrich Priester

USPTO Granted Patents = 22

Average Co-Inventor Count = 4.8

ph-index = 8

Forward Citations = 145(Granted Patents)


Location History:

  • Meckenheim, DE (1988)
  • 6700 Ludwigshafen, DE (1990)
  • Ludwigshafen, DE (1990 - 1997)

Company Filing History:

goldMedal20 out of 10,754 
 
Basf Aktiengesellschaft
 patents
silverMedal1 out of 17 
 
Basf Aktiengsellschaft
 patents
bronzeMedal1 out of 832,680 
Other
 patents

Years Active: 1988-1997

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22 patents (USPTO):Explore Patents
1. 5637700 - Purification of caprolactam (1997-06-10),
2. 5536831 - Obtaining caprolactam by cleavage of molten polycaprolactam (1996-07-16),
3. 5455346 - Obtaining caprolactam by cleavage of molten polycaprolactam (1995-10-03),
4. 5434291 - Preparation of aminopropionitriles (1995-07-18),
5. 5371292 - Preparation of 3-aminomethyl-3,5,5-trimethyl-cyclohexylamine (1994-12-06),
6. 5360905 - Recovery of caprolactam from oligomers and/or polymers of caprolactam (1994-11-01),
7. 5359062 - Recovery of caprolactam from polycaprolactam (1994-10-25),
8. 5350847 - Purification of caprolactam (1994-09-27),
9. 5344983 - Selective preparation of linear pentane-1,5-diamines in increased yields (1994-09-06),
10. 5247120 - Preparation of aminopropionitriles (1993-09-21),
11. 5239120 - Preparation of 2-(3-aminopropyl)-cycloalkylamines (1993-08-24),
12. 5194607 - Reactive dyes with a triphendioxazine chromophore (1993-03-16),
13. 5166443 - Preparation of 2,2-disubstituted pentane-1,5-diamines (1992-11-24),
14. 5068398 - Preparation of 6-aminocaproic esters (1991-11-26),
15. 4965362 - Joint preparation of 3-dialkylaminopropionitriles, bis-(2-cyanoethyl) (1990-10-23),

Title: Claus-Ulrich Priester: Innovator in Caprolactam Purification

Introduction

Claus-Ulrich Priester, based in Ludwigshafen, Germany, is a remarkable inventor known for his significant contributions to the field of chemical engineering, particularly in the purification and production of caprolactam. With an impressive total of 22 patents, Priester has made a lasting impact in the industry.

Latest Patents

Among his latest innovations, Priester has developed methods for the purification of caprolactam. This process involves oxidative treatment where mixtures primarily containing caprolactam and unsaturated lactams are treated with oxygen or an oxygen-containing gas mixture in an alkaline medium. Furthermore, he introduced a method for obtaining caprolactam from caprolactam-containing polymers. This method utilizes a base under reduced pressure to depolymerize polymers that include the repeating unit --[--N(H)--(CH.sub.2).sub.5 --C(O)--], showcasing his innovative approach to chemical processing.

Career Highlights

Priester has had a prominent career with notable companies such as BASF Aktiengesellschaft. His work there played a crucial role in advancing the methods and applications of caprolactam, demonstrating his dedication to innovation in the chemical industry.

Collaborations

Throughout his career, Claus-Ulrich Priester has collaborated with esteemed colleagues, including Franz Merger and Wolfgang Harder. These partnerships have likely enhanced his research and development efforts, contributing to the success of his inventions.

Conclusion

Claus-Ulrich Priester stands out as a trailblazer in the chemical industry with his 22 patents focusing on caprolactam. His work not only reflects his ingenuity but also his commitment to advancing chemical engineering practices. With each invention, he continues to influence the field and inspire future innovations.

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