Company Filing History:
13 out of 32 
3 out of 11 
1 out of 1 Years Active: 1983-2002
Title: Richard B. Greenwalt: Innovator in Iron Ore Processing
Introduction
Richard B. Greenwalt, based in Danville, California, is a prolific inventor with a remarkable portfolio of 18 patents. His work focuses on advanced methodologies to improve the processing and recovery of iron from ores, showcasing his expertise in materials science and engineering.
Latest Patents
Among Richard’s notable patents are two significant innovations in iron ore processing. The first, titled "Method for direct reduction and upgrading of fine-grained refractory and earthy iron ores and slags," provides a novel approach for effectively upgrading rich, fine-grained earthy hematite iron ores. This method involves a solid-state reduction technique that enhances iron grain size while the nonmetallic oxides remain unreduced. The process not only yields large, flat iron flakes but also allows for a high-density recovery, achieving over 92% metallic iron content with less than 4% oxide gangue and an impressive iron recovery rate exceeding 95%.
The second patent, "Magnetically enhanced gravity separator," introduces a cutting-edge apparatus that enhances the performance of gravity separation through the application of a magnetic field. This device facilitates the efficient separation of magnetic target feed materials from other elements in the feed mixture, using tailored magnetic attraction levels to prevent the accumulation of non-target magnetic materials on the separation surface.
Career Highlights
Richard’s career is marked by significant contributions to the field of engineering and materials processing, particularly through his work at prestigious firms such as Bechtel Group, Inc. and Bechtel Corporation. His extensive experience in these leading engineering and construction companies has provided him with a robust foundation for his innovative endeavors.
Collaborations
Throughout his career, Richard Greenwalt has engaged in various collaborative projects within the engineering sector, both in company settings and in partnership with research institutions. His collaborations have been pivotal in transforming theoretical concepts into practical solutions that address real-world challenges in iron ore processing.
Conclusion
In conclusion, Richard B. Greenwalt's contributions to the field of iron ore processing reflect his dedication to innovation and excellence in engineering. His patents not only demonstrate significant advancements in the recovery and upgrade of iron ores but also exemplify the impact of practical innovations in the mining and materials recovery industry. Richard continues to inspire future generations of inventors and engineers with his groundbreaking work.