Company Filing History:
Years Active: 2002-2007
Title: Innovations of David R B Walker
Introduction
David R B Walker is a notable inventor based in Charleston, SC, with a significant contribution to the field of activated carbon technologies. He holds four patents that showcase his innovative approaches to improving automotive emission control systems. His work has been instrumental in enhancing the performance and efficiency of these systems.
Latest Patents
One of Walker's latest patents is for a "Coated Activated Carbon for Automotive Emission Control." This invention discloses a method to avoid attrited carbon dust, leading to improved canister performance in emission control. The application of a thin, continuous polymer coating on granular or shaped activated carbon significantly reduces product attrition without compromising the adsorption velocity or capacity of the activated carbon when used in automotive emission control canisters.
Another significant patent is the "Method of Making Shaped Activated Carbon." This invention describes a new shaped activated carbon and its manufacturing method. The innovation lies in the crosslinking of a polymeric cellulose, such as sodium carboxymethylcellulose (CMC), within the carbon bodies after shaping. This method employs CMC as a binder for the activated carbon, achieving product mechanical strength and water stability through crosslinking rather than high-temperature heat treatment. The crosslinking reaction occurs at temperatures below 270°C, resulting in shaped carbon bodies with superior properties compared to those achieved with other binders.
Career Highlights
Walker has worked with prominent companies such as Meadwestvaco Corporation and Westvaco Corporation. His experience in these organizations has contributed to his expertise in the field of activated carbon and emission control technologies.
Collaborations
Throughout his career, Walker has collaborated with notable professionals, including Peter D A McCrae and Tiejun Zhang. These collaborations have further enriched his work and innovations in the industry.
Conclusion
David R B Walker's contributions to the field of activated carbon technologies have made a significant impact on automotive emission control systems. His innovative patents reflect his dedication to improving environmental performance and efficiency.