Company Filing History:
Years Active: 1978-1982
Title: Innovations by Clifford C. Duff
Introduction
Clifford C. Duff is an accomplished inventor based in Warren, MI (US). He has made significant contributions to the field of recycling and material recovery, particularly focusing on polyurethane foam. With a total of 2 patents, his work has paved the way for more efficient methods of reclaiming valuable materials.
Latest Patents
One of his latest patents is a "Method for reclaiming polyurethane foam." This innovative method involves continuously hydrolyzing urethane foam in a vertically oriented hydrolysis reactor. In this process, a bed of foam particles is formed in the reactor, and superheated steam is flowed continuously upward through the bed. The temperature and rate are controlled so that only the foam particles adjacent to the bottom of the reactor are hydrolyzed, while the bulk of the bed remains unaffected. Liquid hydrolysis products are drained as they are formed, preventing saturation of unhydrolyzed particles.
Another notable patent is the "Feeding apparatus for lightweight plastic particles into a high pressure." This invention allows scrap polyurethane foam particles to be intermittently fed into a high-pressure hydrolysis reactor. A novel feed apparatus mounted on the reactor air carries the particles through a controlled inlet valve. The housing of the feed apparatus is lined with a perforated sleeve that retains a charge of particles while allowing air to be exhausted. A piston then pushes the particles into the high-pressure reactor, completing the cycle.
Career Highlights
Clifford C. Duff is currently employed at GM Global Technology Operations, Inc., where he continues to innovate and develop new technologies. His work has been instrumental in advancing recycling processes and improving material recovery techniques.
Collaborations
Clifford has collaborated with Robert J. Salloum, contributing to the development of innovative solutions in their field.
Conclusion
Clifford C. Duff's contributions to the field of recycling and material recovery through his patents demonstrate his commitment to innovation. His work not only enhances the efficiency of reclaiming materials but also supports sustainable practices in industry.