Company Filing History:
Years Active: 1991-1992
Title: Innovations of Joseph A Cofer, Jr.
Introduction
Joseph A Cofer, Jr. is a notable inventor based in Hixson, TN (US). He has made significant contributions to the field of polyamide yarns, holding a total of 4 patents. His work focuses on developing high-performance materials that exhibit low shrinkage and high tenacity.
Latest Patents
One of his latest patents is a process for making low shrinkage, high tenacity poly(epsilon-caproamide). This polyamide yarn is composed of at least about 85% by weight poly(.epsilon.-caproamide) and boasts impressive properties such as a relative viscosity greater than 50 and a tenacity of at least about 9.3 g/d. The process involves drawing a feed yarn while heating to at least about 185°C, followed by a controlled decrease in tension to achieve optimal yarn characteristics.
Another significant patent is for high tenacity, high modulus polyamide yarn and the process for making it. This yarn consists of at least about 85% poly(hexamethylene adipamide) or poly(.epsilon.-caproamide) and features a relative viscosity greater than 50, a tenacity exceeding 11.0 g/d, and a dry heat shrinkage at 160°C of not more than about 6.5 percent. The manufacturing process includes similar heating and drawing techniques to ensure the yarn meets high-performance standards.
Career Highlights
Joseph A Cofer, Jr. is associated with E.I. DuPont De Nemours and Company, where he has contributed to advancements in material science. His innovative approaches have led to the development of superior polyamide yarns that are utilized in various applications.
Collaborations
Throughout his career, Cofer has collaborated with notable colleagues such as Thomas R Clark, III and Alan R Mochel. These partnerships have fostered a creative environment that encourages the exchange of ideas and expertise in the field of polymer technology.
Conclusion
Joseph A Cofer, Jr. is a distinguished inventor whose work in polyamide yarns has led to significant advancements in material performance. His contributions continue to impact the industry positively, showcasing the importance of innovation in material science.