Marshall F Humphrey

Title: The Innovations of Marshall F Humphrey

Introduction

Marshall F Humphrey is a notable inventor based in Duarte, California. He holds a total of five patents, showcasing his contributions to the field of materials science and engineering. His work primarily focuses on enhancing the properties of carbon-graphite fibers through innovative coatings.

Latest Patents

One of his latest patents is titled "Mixed polyvalent-monovalent metal coating for carbon-graphite fibers." This invention provides an improved coating of gasification catalyst for carbon-graphite fibers, utilizing a mixture of polyvalent metals like calcium and monovalent metals such as lithium. The inclusion of lithium results in a lighter and more flexible coating when applied to a carboxyl-containing resin, such as polyacrylic acid. This innovation reduces cross-link density and creates a glass-like substance during combustion, which helps hold the fiber together, leading to slow and even combustion with significantly reduced conductive fragment evolution. The coated fibers serve as fiber reinforcement for composites.

Another significant patent is "Gasifiable carbon-graphite fibers." This invention addresses the issue of fine carbon-graphite fibers that do not combust during the combustion of a composite, which can lead to the expulsion of fine conductive particles into the air. By coating the fibers with a metal salt that has a work function below 4.2 eV, such as calcium acetate, the combustion of the fibers is catalytically enhanced at temperatures below 1000°C. This allows the fibers to self-support combustion and burn to produce a non-conductive ash. Fire-polishing the fibers before applying the coating is recommended to remove sizing and expose the carbon surface to the catalyst.

Career Highlights

Throughout his career, Marshall F Humphrey has made significant strides in the field of materials science. His innovative approaches to fiber coatings have led to advancements in composite materials, making them more efficient and environmentally friendly.

Collaborations

Marshall has collaborated with notable figures in the field, including James C Fletcher and Robert A Frosch. Their combined expertise has contributed to the success of various projects and innovations.

Conclusion

Marshall F Humphrey's contributions to the field of materials science through his patents and collaborations highlight his role as a significant inventor. His innovative approaches to carbon-graphite fibers continue to influence advancements in composite materials.