Location History:
- Tokyo, JA (1978)
- Yokkaichi, JP (1982)
- Mie, JP (1985)
- Takarazuka, JP (1987)
- Hyogo, JP (1992)
- Toyonaka, JP (1985 - 1995)
- Osaka, JP (1989 - 1995)
- Tokyo, JP (1978 - 1998)
Company Filing History:
20 out of 2,245 
1 out of 2,887 
1 out of 326 
Years Active: 1978-1998
Title: Toshikazu Umemura: Innovator in Polycarbonate Resin Technology
Introduction
Toshikazu Umemura, based in Osaka, Japan, is a prominent inventor known for his significant contributions to the field of polycarbonate resin technology. With a strong portfolio of 20 patents, Umemura has made advancements that are crucial for various applications, including optical materials and automotive lenses.
Latest Patents
Among his latest innovations, Toshikazu Umemura has developed two key patents that showcase his expertise:
1. **Production method of polycarbonate resin pellets** - This patent focuses on a method of producing polycarbonate resin pellets that contain minimal residual organic solvent and low molecular weight volatile matters, while maintaining high transparency. The process involves melt-kneading polycarbonate resin powder in an extruder equipped with a specialized screw and vents to effectively devolatilize contaminants. The produced pellets are ideally suited for optical grade articles and automotive lenses.
2. **Graft precursor and process for producing grafted aromatic polycarbonate** - This invention pertains to the creation of a grafted aromatic polycarbonate resin through melt-kneading a mixture of aromatic polycarbonate resin particles and vinylic copolymer containing active oxygen. The innovative grafting process allows for enhanced material properties, making it beneficial for applications such as optical disks, optical lenses, polymer blend-compatible agents, adhesives, and paints.
Career Highlights
Toshikazu Umemura has built a notable career, having worked for respected companies in the industry. His experience includes roles at Mitsubishi Gas Chemical Company, Inc. and Victor Company of Japan, Limited. These positions have allowed him to apply his knowledge and innovative mindset toward the development of advanced materials.
Collaborations
During his professional journey, Umemura has collaborated with esteemed colleagues including Akitoshi Sugio and Tomotaka Furusawa. Their teamwork has fostered the creative environment necessary for producing groundbreaking technologies in the resin field.
Conclusion
Toshikazu Umemura is a distinguished inventor whose work has significantly impacted the development of polycarbonate resins. Through his innovative patents and collaborations, he continues to pave the way for advancements that benefit a variety of industries, showcasing the importance of research and development in materials science.
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.