Company Filing History:
Years Active: 1981-1998
Title: The Innovations of Harold W. Earhart
Introduction
Harold W. Earhart is a notable inventor based in Corpus Christi, Texas, with a remarkable portfolio of seven patents. His work primarily focuses on advancements in plasticizers for polymers, showcasing his innovative approach to material science.
Latest Patents
Earhart's latest patents include significant developments in lower alkyl biphenyls as plasticizers for polyurethane. This invention presents a significantly improved plasticizer-polymer composition that incorporates a polymer containing di-, tri-, and/or tetra-ethyl-, propyl-, and/or butylbiphenyl plasticizers. These plasticizers constitute the major proportion by weight of any other plasticizing or softening additive, provided that the polymer is not polyvinyl chloride. When the polymer is an elastomer or rubber, or is polystyrene, the plasticizer used is diisopropylbiphenyl and/or triisopropylbiphenyl. Furthermore, when the polymer is of a plastisol, essentially no ester plasticizing additive is present. The method for preparing this plasticizer-polymer composition involves contacting the monomer and/or oligomer component with the plasticizer, mixing to achieve a uniform mixture, and carrying out further processing as desired. This innovation allows for high loading levels of the plasticizer without sacrificing the properties of the plasticized polymer, representing a significant improvement over prior art plasticizing and softening additives.
Career Highlights
Throughout his career, Earhart has worked with prominent companies such as Koch Industries, Inc. and Sun Oil Company of Pennsylvania. His contributions to these organizations have been instrumental in advancing their material science capabilities.
Collaborations
Some of his notable coworkers include Gregory R. Hahn and Jack B. Tatman, who have collaborated with him on various projects throughout his career.
Conclusion
Harold W. Earhart's innovative contributions to the field of plasticizers and polymers have established him as a significant figure in material science. His patents reflect a commitment to improving polymer compositions, which can lead to enhanced performance in various applications.