Company Filing History:
1 out of 11 
1 out of 3,975 
Years Active: 1994-1999
Title: Innovations of Donald Lee Brown
Introduction
Donald Lee Brown is an accomplished inventor based in Livermore, CA. He holds 2 patents that showcase his expertise in advanced technologies. His work primarily focuses on methods and apparatuses that enhance production processes in various fields.
Latest Patents
One of his notable patents is a "Method and apparatus for producing nanoparticles at a high rate." This innovative system utilizes two chambers separated by a narrow duct. The lower chamber contains the source material, which is heated with an electron gun and fed continuously for extended nanoparticle production. The upper chamber is designed to nucleate the nanoparticles, formed when the source vapor collides with a gas. Depending on the desired outcome, the gas can be either inert or reactive. The design allows for differential pumping of the chambers, and the vapor stream flowing through the duct maintains the necessary pressure differentials. Additionally, the upper chamber features a cooled surface that serves as a condensation site for the nanoparticles, which are periodically removed by scrapers into collection containers.
Another significant patent is for a "Pump for molten metal or other fluid." This innovative pump operates without moving parts and is capable of pumping high-temperature molten metal or other fluids in a vacuum or low-pressure environment. The design combines elements of a bubble pump with a trap that isolates the vacuum region from the gas used to create the bubbles. This ensures that the quality of the vacuum is maintained. The pump's unique structure allows bubbles to rise and carry the fluid, which is then collected in a trap for eventual discharge.
Career Highlights
Throughout his career, Donald Lee Brown has worked with notable organizations, including the United States Enrichment Corporation and the United States of America as represented by the United States. His contributions to these organizations have significantly advanced the fields in which he has been involved.
Collaborations
One of his notable coworkers is James A. Horton. Their collaboration has likely contributed to the innovative projects they have undertaken together.
Conclusion
Donald Lee Brown's contributions to the field of invention, particularly in nanoparticle production and fluid pumping technologies, highlight his innovative spirit and technical expertise. His patents reflect a commitment to advancing technology and improving industrial processes.