Company Filing History:

13 out of 12,157

Bayer Aktiengesellschaft

Years Active: 1976-1995

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16 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5384059 - Heat transfer fluid and process for its preparation (1995-01-24),

2. 4990687 - Preparation of 4-methyl-2-cyclohexylphenol (1991-02-05),

3. 4973759 - Process for the isolation of alkylated aromatic amines (1990-11-27),

4. 4912596 - Dielectric liquids (1990-03-27),

5. 4772428 - Impregnating agents and the use thereof (1988-09-20),

6. 4410869 - Dielectric impregnating fluid and its use (1983-10-18),

7. 4370505 - 1,1,3,3-Substituted hydroxyindanes (1983-01-25),

8. 4294715 - Impregnating agent and its use (1981-10-13),

9. 4275241 - Process for the preparation of 3-phenoxy-benzaldehydes (1981-06-23),

10. 4203145 - Chloro-diphenyl (1980-05-13),

11. 4052216 - Color photographic material containing a hydroxyindane (1977-10-04),

12. 4045499 - Process for the preparation of 1,1,3,3-substituted hydroxy indanes (1977-08-30),

13. 4013473 - Recording materials and image receiving materials for producing copies (1977-03-22),

14. 3968173 - Process for the preparation of 5-isopropyl-3-methyl-phenol (1976-07-06),

15. 3954889 - Process for the production of 1,1,3,3-substituted hydroxyindanes (1976-05-04),

Title: The Innovations of Alfons Klein

Introduction

Alfons Klein is a notable inventor based in Duesseldorf, Germany. He has made significant contributions to the field of chemical engineering, particularly in the development of heat transfer fluids and related processes. With a total of 16 patents to his name, Klein's work has had a lasting impact on various industrial applications.

Latest Patents

Klein's latest patents include a heat transfer fluid and a process for its preparation. The first patent describes mixtures consisting essentially of cyclohexylbiphenyls, dicyclohexylbenzenes, phenylbicyclohexyls, and tercyclohexyls, which are outstandingly suitable as heat transfer media. These mixtures can be prepared from biphenyl and cyclohexanol in the presence of bleaching earths and subsequent hydrogenation. Another significant patent is for the preparation of 4-methyl-2-cyclohexylphenol, which can be synthesized by alkylation of p-cresol with cyclohexanol or cyclohexene. This reaction is performed in the liquid phase with the presence of 1-10% by weight of a large pore, acidic zeolite based on the amount of p-cresol.

Career Highlights

Throughout his career, Alfons Klein has worked with prominent companies such as Bayer Aktiengesellschaft and Agfa-Gevaert AG. His experience in these organizations has allowed him to refine his expertise and contribute to innovative projects in the chemical industry.

Collaborations

Klein has collaborated with notable coworkers, including Karlfried Wedemeyer and Rudolf Kron. These partnerships have facilitated the exchange of ideas and advancements in their respective fields.

Conclusion

Alfons Klein's contributions to the field of chemical engineering through his patents and collaborations highlight his innovative spirit and dedication to advancing technology. His work continues to influence the industry and inspire future inventors.

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