Company Filing History:
6 out of 1,256 
1 out of 116 
Years Active: 1990-1998
Title: The Innovative Mind of Shigeko Sujita
Introduction
Shigeko Sujita is a prominent inventor based in Chiba, Japan, known for his groundbreaking work in the field of organic composite coated steel sheets. With a total of six patents to his name, Sujita has significantly contributed to advancements in materials science, particularly focusing on enhancing the durability and environmental safety of steel products.
Latest Patents
One of Sujita's latest patents is for an organic composite coated steel sheet that boasts excellent chromate dissolution resistance, wet adhesion, and corrosion resistance both before and after working. This innovative steel sheet features a chromate-silica film on at least one face of a zinc or zinc alloy plated steel sheet. The silica-added chromate film contains between 5 to 500 mg/m² of metallic chromium and is formulated from a chromate solution with a Cr⁶⁺ content ranging from 25 to 70 wt%. The accompanying resin coating film is crafted from aqueous paint, which includes an aqueous anionic resin and/or a nonionic resin, alongside a reducing agent and water-dispersed silica. The resin coating is applied with a dry weight between 0.1 to 3 g/m².
Another notable invention is an improved organic composite coated steel plate consisting of a zinc or zinc alloy plated steel substrate. This innovative plate incorporates a chromate film with a Cr⁶⁺ content limited to 70% of the total chromium. The chromate film is deposited in an amount of 5-500 mg/m² and is topped with a resin layer formed primarily of water-dispersed silica combined with one of several organic resin types including anionic and nonionic aqueous resins. This environmentally friendly steel plate is specifically designed to eliminate contaminants released in the manufacturing process.
Career Highlights
Throughout his career, Shigeko Sujita has collaborated with leading companies such as Kawasaki Steel Corporation and Dai Nippon Toryo Co., Ltd. His work has focused on developing materials that meet both industrial standards and environmental safety regulations, firmly positioning him as a notable figure in the materials engineering field.
Collaborations
Sujita has worked alongside talented individuals like Kyoko Hamahara and Kazuo Mochizuki. Their collaborative efforts have contributed to the successful development and implementation of various innovative technologies, underscoring the significance of teamwork in driving forward the boundaries of invention.
Conclusion
In conclusion, Shigeko Sujita's contributions to the field of steel coatings demonstrate a commitment to innovation, sustainability, and performance. His six patents reflect a deep understanding of materials science and an ability to create solutions that not only enhance product quality but also protect our environment. As the industry continues to evolve, Sujita's work will undoubtedly inspire future advancements and innovations.