Location History:
- Kanagawa, JA (1976)
- Minami-ashigara, JA (1976 - 1978)
- Minami Ashigara, JP (1978 - 1980)
- Ashigara, JP (1983)
- Kanagawa, JP (1984 - 1989)
- Fujinomiya, JP (1994)
- Shizuoka, JP (1990 - 1997)
Company Filing History:
26 out of 16,458 
1 out of 328 
Years Active: 1976-1997
Title: The Innovative Journey of Sadao Ishige in Heat-Sensitive Recording Materials
Introduction: Sadao Ishige, a prominent inventor based in Shizuoka, Japan, has made significant contributions to the field of heat-sensitive recording materials. With a total of 26 patents to his name, Ishige's work primarily revolves around diazo compounds and their applications in recording technologies.
Latest Patents: Among Ishige's latest innovations are two notable patents. The first is a diazo heat-sensitive recording material that comprises hydroxy coumarin. This innovative recording material boasts excellent raw stock storability and image storage characteristics. It consists of a support layer that contains a recording layer made up of a diazo compound, a coupling component, and an organic base. The diazo compound is a 4-disubstituted amino-2-alkoxybenzenediazonium salt, while the coupling component is represented by a complex general formula featuring various substituents like hydrogen atoms, alkyl groups, aryl groups, and more.
The second recent patent details a process for producing microcapsules containing diazonium salt compounds. This process involves adding a dialkyl sulfate compound to an organic solvent solution containing the diazonium salt and a polyfunctional isocyanate compound. Following this, the mixture is emulsified into an aqueous solution of a water-soluble polymer and polymerization occurs to form the microcapsule walls. The recording material produced by this innovative process is also disclosed within the patent.
Career Highlights: Sadao Ishige's career includes significant tenures at renowned companies such as Fuji Photo Film Company, Limited and Hodogaya Chemical Co., Ltd. His work within these organizations has significantly advanced the development and application of innovative recording materials.
Collaborations: Throughout his illustrious career, Ishige has collaborated with several notable professionals, including Takekatsu Sugiyama and Keiso Saeki. These collaborations have been integral to the advancement of his work and the successful development of his patented technologies.
Conclusion: Sadao Ishige's contributions to the field of heat-sensitive recording materials are exemplary of innovation and technological advancement. His dedication and inventiveness are showcased through his numerous patents, which not only enhance the performance of recording materials but also lay the groundwork for future developments in this essential technology.
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.