This inventor holds 1 USPTO granted patent. Top assignees: Taisei Corporation, Other. Active years: 1984.
Company Filing History:
1 out of 81 
1 out of 834,411 Years Active: 1984
Title: Norio Marushima: Innovator in Cement Paste Preparation
Introduction
Norio Marushima is a notable inventor based in Ichikawa, Japan. He has made significant contributions to the field of construction materials, particularly in the preparation of cement pastes. His innovative methods have the potential to enhance the quality and efficiency of cement-based products.
Latest Patents
Marushima holds a patent for a method of preparing kneaded compositions. This method involves adding approximately 30 to 76% of the total water to cement to create a funicular, capillary, or slurry state. The mixture is then kneaded to minimize coagulated lumps of cement. After this initial kneading, the remaining water is added, and the mixture is kneaded again. Sand and/or gravel can be incorporated after the first kneading. The resulting cement paste, mortar, or green concrete demonstrates a low percentage of bleeding water and exhibits high compression strength.
Career Highlights
Throughout his career, Marushima has worked with prominent companies, including Taisei Corporation. His work has focused on improving construction materials, which has had a lasting impact on the industry.
Collaborations
Marushima has collaborated with notable individuals in his field, including Yasuro Ito and Yoshiro Higuchi. Their combined expertise has contributed to advancements in cement preparation techniques.
Conclusion
Norio Marushima's innovative approach to cement paste preparation showcases his dedication to enhancing construction materials. His patent and collaborations reflect his significant contributions to the industry.