Location History:
- Maplewood, MN (US) (1977 - 1985)
- Saint Paul, MN (US) (1988 - 1991)
- Stillwater, MN (US) (1987 - 1993)
Company Filing History:
20 out of 7,865 
2 out of 128 Years Active: 1977-1993
Title: The Innovative Contributions of Harold G Sowman
Introduction
Harold G Sowman, a prominent inventor based in Maplewood, MN, has made significant contributions to the field of ceramics through his inventive spirit and extensive research. With a remarkable portfolio of 22 patents, Sowman has pioneered advancements that enhance the functionality and application of ceramic materials.
Latest Patents
Among his latest innovations, Sowman has developed microcrystalline alumina-based ceramic articles that consist of at least 60% alumina by weight with precisely tailored iron equivalence. These ceramic articles possess a unique grain structure with alpha alumina crystallites, contributing to their high strength and density. This technology is particularly advantageous for producing high modulus refractory fibers as well as various shapes such as beads, flakes, and abrasive particles. The sol-gel process employed by Sowman is a noteworthy aspect of his invention, utilizing hydroxy iron polymers to facilitate the alpha alumina transformation, resulting in a fine-grained microstructure.
Additionally, his creation of sol gel-derived ceramic microbubbles stands out. These discrete, free-flowing ceramic microbubbles are characterized by their unique composition and structure, featuring diameters ranging from 1 to 300 micrometers and wall thicknesses comprising less than 10 percent of their diameter. This innovative process allows for the production of uniform, hollow ceramic microbubbles that can be utilized in various applications.
Career Highlights
Harold G Sowman has had a remarkable career with substantial experience at recognized companies. He honed his skills at Minnesota Mining and Manufacturing Company and General Atomic Company, where his innovations laid the groundwork for advancements in ceramic technologies.
Collaborations
Throughout his career, Sowman has collaborated with talented professionals, including notable coworkers Roger W Lange and David R Kaar. These collaborations have enhanced the innovative process behind his patents and fostered an environment of creativity and technological advancement.
Conclusion
With an impressive array of patents, Harold G Sowman has undoubtedly made lasting contributions to the field of ceramics. His pioneering inventions, particularly in microcrystalline alumina ceramics and sol gel-derived ceramic microbubbles, continue to inspire further research and development. His career serves as a testament to the impact of innovation in advancing material technologies.