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For the Inventor, By the Inventor

Frankfurt am Main, Germany

Alexander Sieber

USPTO Granted Patents = 13

Average Co-Inventor Count = 3.2

ph-index = 7

Forward Citations = 159(Granted Patents)


Company Filing History:

goldMedal13 out of 6,662 
 
Hoechst Aktiengesellschaft
 patents

Years Active: 1988-1993

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13 patents (USPTO):Explore Patents
1. 5194665 - Surfactants based on hydroxynaphthoic esters and preparation and use (1993-03-16),
2. 5137576 - Quinacridones having selectively adjusted triboelectric effects (1992-08-11),
3. 5102459 - Use of colorants for recording fluids (1992-04-07),
4. 5073579 - Process for enhancing the electrostatic chargeability of powder coatings (1991-12-17),
5. 5069994 - Use of colorless, intensely fluorinated ammonium and iminium compounds (1991-12-03),
6. 5061585 - Blue coloring agent for electro-photographic copying processes with (1991-10-29),
7. 5021473 - Process for enhancing the electrostatic chargeability of powder coatings (1991-06-04),
8. 5015676 - Process for enhancing the electrostatic chargeability of powder coatings (1991-05-14),
9. 4980425 - Surfactants based on hydroxynaphthoic esters and preparation and use (1990-12-25),
10. 4957841 - Specifically influencing the triboelectric effect of azo pigments (1990-09-18),
11. 4859728 - Pasty pigment formulations, production and use thereof (1989-08-22),
12. 4786575 - Pigment for electrophotographic recording processes (1988-11-22),
13. 4777105 - Magenta colorant for electrophotographic recording processes (1988-10-11),

Title: Alexander Sieber: Innovator in Surfactant Technology

Introduction

Alexander Sieber is a prominent inventor based in Frankfurt am Main, Germany. He has made significant contributions to the field of surfactants and their applications in various industries. With a total of 13 patents to his name, Sieber's work has been instrumental in advancing the technology surrounding dispersants and emulsifiers.

Latest Patents

Among his latest patents, Sieber has developed surfactants based on hydroxynaphthoic esters. This innovation addresses the increasing demands for dispersants, emulsifiers, and formulation aids, particularly in the preparation of azo dyes and pigments. The patented process involves the esterification of hydroxynaphthalenecarboxylic acids with fatty alcohols or alkoxylates, leading to the creation of novel polyfunctional surfactant structures. These structures are highly suitable for a wide range of applications in dispersion and emulsification.

Another notable patent focuses on quinacridones with selectively adjusted triboelectric effects. This invention includes quinacridones that contain a specific percentage of triboelectrically active compounds, enhancing their functionality in various applications.

Career Highlights

Sieber's career has been marked by his association with Hoechst Aktiengesellschaft, a leading company in the chemical industry. His work has not only contributed to the company's portfolio but has also set new standards in surfactant technology.

Collaborations

Throughout his career, Sieber has collaborated with notable colleagues, including Hans-Tobias Macholdt and Claus Godau. These partnerships have fostered innovation and have played a crucial role in the development of his patented technologies.

Conclusion

Alexander Sieber's contributions to surfactant technology and his innovative patents have made a significant impact in the field. His work continues to influence the development of new materials and applications, showcasing the importance of innovation in the chemical industry.

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