Location History:
- Greifensee, Zurich, CH (1976)
- CH-8049 Zurich, CH (1986)
Company Filing History:
2 out of 832,680 Years Active: 1976-1986
Title: Innovations of Hans-Christoph Siegmann
Introduction
Hans-Christoph Siegmann is a notable inventor based in Greifensee, Zurich, Switzerland. He has made significant contributions to the field of particle charging and electron polarization, holding a total of 2 patents.
Latest Patents
One of his latest patents is a method for charging particles suspended in gases. This invention involves a method and apparatus for electrically charging particles of liquid or solid matter suspended in gases, particularly in air. The process includes irradiating the particle-carrying gas with ultraviolet light that has energy below the threshold for ionization of the gas, but above the photoelectric threshold of the particles. The charging occurs through photoemission of electrons from the particles. The photoelectrons or negative small ions are then removed from the vicinity of the positively charged particles by diffusion to a charge-absorbing surface. This method is highly effective, especially for very small particles, and provides chemical information on the particles and their surfaces.
Another significant patent by Siegmann is related to the source of spin-polarized electrons. This invention describes a method of producing intense beams of polarized free electrons using a semiconductor with a spin-orbit split valence band and negative electron affinity as a photocathode, which is irradiated with circularly polarized light.
Career Highlights
Hans-Christoph Siegmann has established himself as a prominent figure in his field through his innovative work and patents. His research has contributed to advancements in the understanding and application of particle charging and electron polarization.
Collaborations
He has collaborated with notable individuals such as Andreas Schmidt-Ott and Daniel Thornton Pierce, further enhancing the impact of his work in the scientific community.
Conclusion
Hans-Christoph Siegmann's contributions to the field of particle charging and electron polarization are noteworthy. His innovative patents reflect his expertise and commitment to advancing technology in these areas.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.