This inventor holds 1 USPTO granted patent. Top assignees: Earth Sciences Limited, National Steel Corporation, Southwire Company, LLC. Active years: 1977.
Company Filing History:
1 out of 17 
1 out of 134 
1 out of 578 Years Active: 1977
Title: Douglas Stevens - Innovator in Aluminum Recovery
Introduction
Douglas Stevens is an accomplished inventor based in Golden, Colorado. He is known for his innovative work in the field of aluminum recovery from alunite ore. His contributions to the industry have been recognized through his patent, which outlines a unique method for extracting aluminum hydroxide.
Latest Patents
Stevens holds a patent for the "Redox treatment of alunite ore." This invention relates to a method for recovering aluminum hydroxide from alunite ore by roasting the ore to remove water of hydration, roasting it again in a reducing atmosphere to remove sulfate, roasting a third time in an oxidizing atmosphere to convert any sulfides formed in the second roast, leaching with a weak base, leaching with water to remove potassium and sulfate, extracting the aluminum content with a mixture of sodium hydroxide and potassium hydroxide, removing contaminant silica from the leach solution, and precipitating aluminum hydroxide by cooling and seeding the solution. This innovative approach has the potential to enhance the efficiency of aluminum extraction processes.
Career Highlights
Throughout his career, Douglas Stevens has worked with notable companies such as National Steel Corporation and Earth Sciences Limited. His experience in these organizations has contributed to his expertise in the field of materials science and engineering.
Collaborations
Stevens has collaborated with several professionals in his field, including David L. Thompson and Julian V. Copenhaver. These collaborations have likely enriched his work and contributed to the development of his innovative patent.
Conclusion
Douglas Stevens is a significant figure in the field of aluminum recovery, with a patented method that showcases his innovative spirit. His work continues to influence the industry and demonstrates the importance of advancements in materials science.