Company Filing History:
28 out of 74 
2 out of 114 
Years Active: 1978-1989
Title: **Innovations by Donald R. Weir: A Pioneer in Zinc Recovery and Copper Powder Production**
Introduction
Donald R. Weir, based in Fort Saskatchewan, Canada, is a prolific inventor renowned for his contributions to the fields of metallurgy and materials science. With an impressive portfolio of 28 patents, he has significantly advanced the processes for recovering valuable metals from ore and by-products.
Latest Patents
Among his most recent innovations, Weir's patent titled "Recovery of Zinc from Zinc-Containing Sulphidic Material" details a sophisticated method for extracting zinc from complex mineral compositions. This process involves leaching zinc-containing sulphidic material and zinc oxide under pressurized and oxidizing conditions, utilizing an aqueous sulfuric acid solution. By optimizing the stoichiometric excess of sulfuric acid, his method effectively segregates lead and/or silver values from the leach solution composed primarily of zinc and iron.
Another notable patent is the "Production of Fine Spherical Copper Powder," which describes a technique for manufacturing fine copper powder with particle sizes under 5 micrometers. This innovative process involves an ammoniacal cuprous salt solution, which is neutralized in an oxygen-free environment to yield high-purity fine copper powder.
Career Highlights
Throughout his career, Weir has made significant contributions while working with leading mining and metallurgical companies, including Sherritt Gordon Mines Limited and Cominco Ltd. His work at these institutions has allowed him to develop and refine cutting-edge processes, particularly in the recovery and production of metals.
Collaborations
Weir's innovative work has often involved collaboration with esteemed colleagues such as Roman M. Genik-Sas-Berezowsky and Ian M. Masters. Together, they have pushed the boundaries of metallurgical innovation, leading to advancements that have benefitted the industry significantly.
Conclusion
Donald R. Weir’s extensive patent portfolio and his innovative contributions to metal recovery and processing demonstrate his vital role as an inventor in the field. His latest patents reflect his commitment to advancing metallurgical practices and optimizing processes to enhance efficiency and sustainability in metal production.