Company Filing History:
Years Active: 1998-2000
Title: The Innovative Contributions of Annette Johnen
Introduction
Annette Johnen, an accomplished inventor based in Langerwehe, Germany, has made significant advancements in the field of luminescent materials. Her work has garnered recognition through the granting of two patents, showcasing her dedication to innovation and research.
Latest Patents
Johnen's latest patents focus on a method of coating a luminescent material with a crystalline layer of a metal oxide M.sub.2 O.sub.3. In this innovative method, a metal M, chosen from the group consisting of Yttrium (Y) and Aluminum (Al), is used. The technique involves introducing the luminescent material into a solution of a metal M salt. Following this, a compound of the metal M is deposited on the luminescent material through homogeneous precipitation. The material is then separated from the solution, dried, and heated. This method is noteworthy as it minimizes mercury absorption, crucial for maintaining the color point of low-pressure mercury discharge lamps as they age.
Career Highlights
Annette Johnen is currently affiliated with U.S. Philips Corporation, where she applies her expertise in developing advanced luminescent materials. Her commitment to research and development has positioned her as a valuable asset within her organization, contributing to innovative lighting solutions that enhance energy efficiency and performance.
Collaborations
Throughout her career, Johnen has collaborated with notable colleagues, including Cornelis Reinder Ronda and Volker U Weiler. These partnerships have fostered a collaborative environment that encourages knowledge exchange and innovation in the field.
Conclusion
Annette Johnen's contributions to the field of luminescent materials are significant and reflect her innovative spirit. With her two patents, she continues to pave the way for advancements in lighting technologies. As she progresses in her career, her ongoing research and collaborations will undoubtedly lead to further breakthroughs in this exciting area of technology.