Company Filing History:
3 out of 7,865 
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1 out of 388 Years Active: 1991-1998
Title: Innovations of Jean A. Lown in Magnetic Alloy Particles
Introduction
Jean A. Lown is a prominent inventor based in Saint Paul, MN, known for her significant contributions in the field of magnetic materials. With a total of four patents to her name, she has developed innovative methods that enhance the stability and usability of magnetic alloy particles in various applications.
Latest Patents
Among her latest innovations, Jean A. Lown has developed a patented method for producing acicular magnetic alloy particles. This process is designed to create highly stable magnetic alloy particles featuring high coercivities and saturation magnetization. The method involves several steps: providing a precursor selected from iron oxide hydroxide and iron oxide particles, reducing these precursor particles to magnetic alloy particles, passivating the particles in an oxygen-containing atmosphere, annealing them at specified temperatures, and further oxidizing the annealed particles.
Additionally, she holds a patent for a process for making goethite, which involves producing spindle-shaped goethite particles by oxidizing a ferrous carbonate intermediate in the presence of a growth modifier or by altering the flow rate of oxidizing gas during oxidation. The resulting goethite particles are characterized by a narrow size distribution, a high aspect ratio, and a lack of dendritic structures, making them suitable for high-density magnetic recording media.
Career Highlights
Jean has worked with respected companies such as Minnesota Mining and Manufacturing Company (3M) and Imation Corporation. Her tenure at these organizations has allowed her to participate in cutting-edge research and development, particularly in magnetic materials.
Collaborations
Throughout her career, Jean has collaborated with notable professionals including Yasutaka Ota and Kenji Okinaka. These collaborations have enhanced her research efforts and contributed to her innovative achievements in the field.
Conclusion
Jean A. Lown’s work has had a substantial impact on the area of magnetic materials, demonstrating the importance of innovation in advancing technology. Her patents represent significant steps forward in the production and application of magnetic alloy particles, underscoring her role as a valuable inventor in the field.