Wakayama, Japan

Yoshihisa Ujita


Average Co-Inventor Count = 5.0

ph-index = 1

Forward Citations = 85(Granted Patents)


Company Filing History:


Years Active: 2010

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1 patent (USPTO):Explore Patents

Title: The Innovations of Yoshihisa Ujita in Surface Conditioning Technologies

Introduction: Yoshihisa Ujita, a notable inventor based in Wakayama, Japan, has made significant strides in the field of surface conditioning for steel members. With a focus on enhancing the performance of oil country tubular goods (OCTG), his innovative approach has garnered attention within the industry.

Latest Patents: Ujita holds a patent for a method of surface conditioning prior to chemical conversion treatment of steel members. His patent describes a process where a threaded joint for OCTG is treated with an aqueous solution of potassium tetraborate or sodium tetraborate. This preparation is vital as it leads to the formation of a manganese phosphate chemical conversion coating on the steel surface, featuring coarse crystal grains averaging between 10 to 110 micrometers. This coating is instrumental in retaining a substantial quantity of liquid lubricant, effectively preventing galling during the makeup of threaded joints for OCTG.

Career Highlights: Ujita is associated with Sumitomo Metal Industries, a leader in the steel manufacturing sector. His expertise and innovative solutions have contributed to the company's reputation for excellence in producing high-quality steel products. His commitment to advancing technologies related to OCTG has set a standard within the industry.

Collaborations: During his career, Ujita has collaborated with talented colleagues such as Masaru Izawa and Kunio Godo. These collaborations have fostered an environment of innovation and creative problem-solving, further enhancing the development of advanced surface treatment technologies.

Conclusion: Yoshihisa Ujita's contributions to the field of surface conditioning represent a significant advancement in the treatment of steel members. His patented methods not only improve the performance of OCTG but also emphasize the importance of innovation in industrial applications. As he continues his work at Sumitomo Metal Industries, Ujita's efforts highlight the critical role that inventors play in shaping the future of engineering and materials science.

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