Location History:
- Moriguchi, JP (1993 - 1997)
- Kawachinagano, JP (1991 - 2004)
- Osaka, JP (1991 - 2006)
- Yao, JP (2008 - 2010)
Company Filing History:
15 out of 72 
11 out of 1,344 
3 out of 8 Years Active: 1991-2010
Title: Shigeo Fujita: Innovator in Polymethine Compounds
Introduction
Shigeo Fujita, based in Osaka, Japan, is a prolific inventor with an impressive portfolio of 30 patents. His innovations primarily focus on polymethine compounds, which have significant applications in various fields, including electronics and materials science. His contributions have paved the way for advancements in the production of high-purity intermediates and novel compound forms.
Latest Patents
Fujita's latest patents include groundbreaking inventions in the realm of polymethine ether compounds. One notable patent describes novel compounds that serve as intermediates for creating polymethine compounds with a desired counter ion, ensuring high purity and yield. The compounds are represented by a general formula where R can denote various groups, including alkyl or aryl groups, contributing to their versatility.
Another significant patent details a nonsolvate-form crystal of a polymethine compound, which boasts excellent stability in solution. This crystal demonstrates a high gram extinction coefficient, making it ideal for use with semiconductor lasers, showcasing its potential in high-tech applications. The process for producing this compound involves reacting a polymethine ether compound with hydrochloric or hydrobromic acid, streamlining the production of high-quality materials.
Career Highlights
Throughout his career, Fujita has held various positions in renowned companies such as Yamamoto Chemicals, Inc. and Mita Industrial Co., Ltd. His work within these organizations has allowed him to refine his research and development skills, further enhancing his contributions to the field of chemistry and materials science.
Collaborations
Fujita has collaborated with notable coworkers such as Ryuji Wataki and Yojiro Kumagae. Their joint efforts in research have led to significant advancements in their respective areas, driving innovation and fostering a collaborative environment conducive to groundbreaking discoveries.
Conclusion
Shigeo Fujita's vast experience and innovative spirit continue to impact the field of polymethine compounds significantly. His recent patents not only reflect his dedication to advancing chemical technology but also highlight his expertise in creating novel compounds that offer practical solutions in various industries. As industries evolve, Fujita's work will undoubtedly remain a vital part of this journey toward innovation and discovery.