Company Filing History:
Years Active: 1992
Title: The Innovations of Robert J Waltman in Electrophotography
Introduction
Robert J Waltman is an inventive mind located in Gilroy, California, known for his contribution to the field of electrophotography. With a single but significant patent to his name, Waltman has made noteworthy advancements that could influence various applications in imaging technology.
Latest Patents
Waltman's patent, titled "Electrophotographic photoconductor contains ordered copolyester," presents a layered electrophotographic photoconductor. This innovative design includes a ground plane layer, a charge generating layer, and a charge transport layer. The polymeric binder material utilized in these layers comprises an ordered copolyester-carbonate, with an ester content ranging from approximately 35 wt. % to 70 wt. %. Among these, the preferred content is about 60 wt. % to 70 wt. %, while 70 wt. % is identified as the most favorable. Notably, the charge generating molecule is a squarylium, specifically 2,4-bis-(4-dimethylamino-2-hydroxyphenyl) cyclobutene diylium-1,3-diolate (OHSQ), or a phthalocyanine compound, preferably oxytitanium phthalocyanine. Furthermore, the charge transporting molecule is a hydrazone, with 4-diethylaminobenzaldehyde-1,1-diphenylhydrazone (DEH) and 4-diphenylaminobenzaldehyde-1,1-diphenylhydrazone (TPH) as specific examples.
Career Highlights
Robert J Waltman is affiliated with Lexmark International, Inc., where he continually engages in innovative projects and research. His career reflects a solid commitment to advancing technology in the realm of imaging and photoconductors. While he has only one patent, it illustrates the potential impact of his work in the industry.
Collaborations
Waltman has collaborated with notable coworkers, including James M Adley and Vernon M Balthis. These partnerships contribute to the development of cutting-edge technologies and signify the collaborative efforts essential in the innovation landscape.
Conclusion
Robert J Waltman stands as a testament to the innovative spirit present within the field of electrophotography. His patent showcases an intriguing advancement in photoconductor technology, reflecting both his expertise and the collaborative efforts of his colleagues. As technology continues to evolve, inventions like Waltman's pave the way for new possibilities in imaging solutions.