Company Filing History:
1 out of 162 
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1 out of 832,812 Years Active: 1984-1990
Title: **Innovative Contributions of John H Schemel in Zirconium Alloy Manufacturing**
Introduction
John H Schemel, an accomplished inventor based in Kennewick, WA, is recognized for his significant contributions to the field of materials engineering, particularly in the manufacturing of zirconium alloy tubes. With a portfolio that includes three patents, Schemel has dedicated his career to developing innovative methods that enhance material performance.
Latest Patents
Among his latest inventions, one stands out: the method of manufacturing tubes of zirconium alloys with improved corrosion resistance. This invention pertains to a process that utilizes 1-5 percent by weight of alloying elements such as Sn, Fe, Cr, and Ni. The method emphasizes the importance of annealing after extrusion, as well as during cold rollings, to achieve optimal corrosion resistance through a carefully controlled temperature range in the alpha-phase zone. This innovative approach allows for significantly longer times than those typically standardized, ensuring equilibrium between secondary phase particles and the zirconium matrix, leading to a minimized content of Fe in solid solution.
Another notable patent is the floating cylindrical mandrel and method for producing tubing. This invention involves both a method and apparatus designed for the production of tubing from hollows or workpieces in the form of tubes with greater wall thickness than the finished product. It operates on a McKay rocker mill, where the mandrel is allowed to float in the hollow, restrained by friction at the rocker crosshead. This design reduces high tensile forces that could otherwise lead to mandrel failure, showcasing Schemel's innovative problem-solving capabilities.
Career Highlights
Throughout his career, John H Schemel has been associated with reputable companies, including Santrade Ltd and Sandvik Special Metals LLC. His work at these organizations has underscored his commitment to advancing materials technology, particularly in the manufacturing processes for metal alloys.
Collaborations
Schemel has collaborated with notable coworkers such as Erik T Anderrson and Sten A Wilson. These partnerships have contributed to the refinement of his inventions and have fostered a collaborative environment that encourages the exchange of ideas and innovation in the field of materials science.
Conclusion
John H Schemel's innovative work, particularly in the manufacturing of zirconium alloy tubes, has established him as a key figure in the field. His patents reflect a thorough understanding of materials engineering and a persistent drive to enhance manufacturing processes, ensuring that his contributions will have a lasting impact on the industry.