Company Filing History:
Years Active: 2004-2007
Title: Douglas Eric Spahr: Innovator in Nanoparticle Technology
Introduction
Douglas Eric Spahr is a notable inventor based in Wilmington, DE (US), recognized for his contributions to the field of nanoparticle technology. He holds a total of 4 patents, showcasing his innovative approach to enhancing the properties and applications of nanoparticles.
Latest Patents
One of his latest patents is titled "Lower-energy process for preparing passivated inorganic nanoparticles." This invention focuses on a method to reduce the chemical activity and photo activity of titanium dioxide nanoparticles. The process involves adding an amorphous alumina-stabilizing agent, such as citric acid, to an aqueous slurry of titanium dioxide nanoparticles. The slurry is treated with a source of alumina, like sodium aluminate, to form alumina-treated titanium dioxide nanoparticles. The resulting nanoparticles, which have a particle size of about 50 to 300 nm, are milled to achieve a size approximately 15% smaller than silica-treated inorganic nanoparticles milled under similar conditions. These titanium dioxide nanoparticles are particularly useful in cosmetic, coating, and thermoplastic compositions.
Another significant patent is a "Composition comprising nanoparticle TiO2 and ethylene copolymer." This invention discloses a composition that includes nanoparticle-sized TiO2 and an ethylene copolymer or its ionomer, with the option of including a second polymer. The resulting composition, which possesses a UV light barrier, can be utilized to protect products susceptible to UV damage, such as foodstuffs.
Career Highlights
Douglas Eric Spahr is currently employed at E.I. DuPont De Nemours and Company, where he continues to innovate in the field of materials science. His work has significantly advanced the understanding and application of nanoparticles in various industries.
Collaborations
Throughout his career, Spahr has collaborated with several esteemed colleagues, including Allan Blase, Joseph Rodrigues, and Ken Stephen Schermacher. These collaborations have contributed to the development of groundbreaking technologies and innovations in nanoparticle applications.
Conclusion
Douglas Eric Spahr's contributions to nanoparticle technology through his patents and collaborations highlight his role as a leading inventor in this field. His work continues to influence various industries, paving the way for future innovations.