Company Filing History:
Years Active: 2004-2008
Title: Innovations of Jean-Michel Roquais
Introduction
Jean-Michel Roquais is a notable inventor based in Dijon, France. He has made significant contributions to the field of electronics, particularly in the development of cathodes for cathode ray tubes and electron guns. With a total of 3 patents to his name, Roquais has demonstrated a commitment to enhancing the performance and longevity of electronic components.
Latest Patents
One of Roquais' latest patents is for a cathode designed for cathode ray tubes that boasts an improved lifetime. This innovative cathode features an emissive part in the form of a porous pellet that is impregnated with a compound of alkaline earth metals. The pellet is strategically placed in a dish made of refractory material and is covered with a porous metal foil, which forms the emissive surface of the cathode. The design includes a separation surface between a heavily impregnated zone and a zone that is either not impregnated or weakly impregnated. This unique separation surface, which includes a hollow part facing the emissive surface, significantly enhances the lifetime of the cathode.
Another notable patent by Roquais is for an oxide cathode used in electron guns, which incorporates a differentially doped metallic substrate. This substrate has a thickness of ≤100 μm and contains various reducing agents such as silicon or aluminum. The top face of the substrate has specific weight concentrations of magnesium, silicon, aluminum, and tungsten, while the bottom face has a lower magnesium concentration and a higher concentration of silicon or aluminum. This innovative design maximizes the lifetime of the cathode while minimizing the turn-on time.
Career Highlights
Throughout his career, Jean-Michel Roquais has worked with prominent companies, including Thomson Licensing and Thomson Licensing S.A. His work has been instrumental in advancing technologies related to cathodes and electron guns, making him a respected figure in the field of electronics.
Collaborations
Roquais has collaborated with notable professionals in his field, including Jean-Luc Ricaud and Donald John Wierschke. These collaborations have contributed to the development of innovative technologies and have furthered advancements in electronic components.
Conclusion
Jean-Michel Roquais is a distinguished inventor whose work has significantly impacted the electronics industry. His innovative patents and collaborations reflect his dedication to improving electronic components, particularly in enhancing the