John Henry Lipian

Title: John Henry Lipian: Innovator in Polymer Chemistry

Introduction

John Henry Lipian is a notable inventor based in Medina, OH (US). He has made significant contributions to the field of polymer chemistry, particularly through his innovative methods of polymerizing poly(cyclic)olefin monomers. His work has implications for various applications, including photoresist compositions.

Latest Patents

John Henry Lipian holds a patent for "Vinyl addition polycyclic olefin polymers prepared with non-olefinic chain transfer agents and uses thereof." This patent describes a method of polymerizing poly(cyclic)olefin monomers by combining a monomer composition with a non-olefinic chain transfer agent and an activator compound. The process involves heating the mixture and adding a polymerization catalyst containing nickel (Ni) and/or palladium (Pd). The non-olefinic chain transfer agent includes various compounds such as alkylsilanes and alkylgermanes. The activator is characterized by having an active hydrogen with a pKa of at least 5. The resulting poly(cyclic)olefin polymers can be utilized in photoresist compositions.

Career Highlights

John Henry Lipian is associated with Promerus, LLC, where he has been able to apply his expertise in polymer chemistry. His innovative approach to polymerization has led to advancements in the materials used in various industrial applications.

Collaborations

Some of his notable coworkers include Larry Funderburk Rhodes and Dennis A Barnes. Their collaborative efforts have contributed to the success of projects within the company.

Conclusion

John Henry Lipian's contributions to polymer chemistry through his innovative patent demonstrate his role as a significant inventor in the field. His work continues to influence the development of advanced materials.