This inventor holds 8 USPTO granted patents. Top assignees: Thiokol Corporation, Cordant Technologies Inc., Morton Thiokol Inc.. Active years: 1989-2001.
Company Filing History:
5 out of 383 
2 out of 49 
1 out of 212 Years Active: 1989-2001
Title: Innovations of James A Hartwell
Introduction
James A Hartwell is a notable inventor based in Elkton, MD (US). He has made significant contributions to the field of composite materials and propellant manufacturing. With a total of 8 patents, Hartwell's work has advanced the technology used in high-performance applications.
Latest Patents
One of Hartwell's latest patents is for "Reinforced composite articles and method of making same." This invention involves a composite tubular article, such as a nozzle or polar boss for a rocket motor. The design features straight matrix impregnated yarn portions that extend from one end to the other in a non-cylindrical ply, achieving increased strength while maintaining a lighter weight. The matrix material can be partially cured by actinic radiation, allowing for the elimination of radial rods used for anchoring the yarn. This innovation is particularly beneficial for high-performance rocket motor nozzle components.
Another significant patent is the "Process for the manufacture of high performance gun propellants." This process involves creating a high-performance gun propellant that contains an energetic thermoplastic elastomeric binder and a high-energy oxidizer. The method includes preparing a molding powder of high-energy oxidizer particles coated with the binder and extruding it into the desired configuration. The concentrations of the components are carefully controlled to optimize performance.
Career Highlights
Throughout his career, Hartwell has worked with prominent companies such as Thiokol Corporation and Cordant Technologies Inc. His experience in these organizations has allowed him to develop and refine his innovative ideas in the field of materials science and propellant technology.
Collaborations
Hartwell has collaborated with notable coworkers, including Rodney L Willer and Andrew C Haaland. These partnerships have contributed to the successful development of his patented technologies.
Conclusion
James A Hartwell's contributions to innovations in composite materials and propellant manufacturing have made a significant impact in the field. His patents reflect a commitment to advancing technology for high-performance applications.