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For the Inventor, By the Inventor

Neckarsteinach, Germany

Erich Fretschner

USPTO Granted Patents = 13

Average Co-Inventor Count = 2.6

ph-index = 4

Forward Citations = 27(Granted Patents)


Company Filing History:

goldMedal13 out of 10,754 
 
Basf Aktiengesellschaft
 patents

Years Active: 1991-2006

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13 patents (USPTO):Explore Patents
1. 7002023 - Method for producing 1 substituted 5-chloro-4 methly pyrazoles (2006-02-21),
2. 6538135 - Method for producing 4-amino-5-chloro-1-phenyl pyridazinone-(6) (2003-03-25),
3. 6515139 - Method for producing N-substituted 2-pyrazoline-5-one (2003-02-04),
4. 6252069 - Method for the production of 3-isopropyl-1H-2, 1,3-benzothiadiazine-4 (3H)-one-2,2-dioxide (2001-06-26),
5. 6229022 - Method for producing substituted pyrazoles (2001-05-08),
6. 5939584 - Process for preparing solid, free-flowing water-soluble salts of (1999-08-17),
7. 5847154 - Method of preparing 1,2-dimethyl-3,5-diarylpyrazolium methylsulfates (1998-12-08),
8. 5840913 - Process for preparing N-substituted pyrazoles (1998-11-24),
9. 5763659 - Preparation of optically active 2-halopropionic acids (1998-06-09),
10. 5744614 - Preparation of 3,5-diarylpyrazoles (1998-04-28),
11. 5569769 - Preparation of pyrazole and its derivatives (1996-10-29),
12. 5128480 - Preparation of 3-methylpyrazole (1992-07-07),
13. 4996327 - Preparation of pyrazole and its derivatives (1991-02-26),

Title: The Innovative Contributions of Erich Fretschner

Introduction

Erich Fretschner is a notable inventor based in Neckarsteinach, Germany. He has made significant contributions to the field of chemistry, particularly in the development of new chemical processes. With a total of 13 patents to his name, Fretschner's work has had a considerable impact on various applications in the industry.

Latest Patents

Among his latest patents is a method for producing 1-substituted 5-chloro-4-methylpyrazoles. This invention relates to a process for preparing these compounds, where a 4-methylpyrazole is reacted with chlorine. The resulting mixture of monochlorinated and dichlorinated products is then fractionated by distillation. Subsequently, the dichlorinated compound is dehalogenated and returned to the reaction with chlorine. Another significant patent is for the method of producing 4-amino-5-chloro-1-phenyl pyridazinone-(6), showcasing his expertise in chemical synthesis.

Career Highlights

Erich Fretschner is currently associated with BASF Aktiengesellschaft, a leading chemical company. His work at BASF has allowed him to explore innovative solutions and contribute to advancements in chemical manufacturing processes. His extensive experience and knowledge in the field have positioned him as a valuable asset to the company.

Collaborations

Fretschner has collaborated with notable colleagues, including Hans Rupert Merkle and Hanspeter Hansen. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

Erich Fretschner's contributions to the field of chemistry through his patents and collaborations highlight his role as a significant inventor. His innovative methods continue to influence the industry and pave the way for future advancements.

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