Company Filing History:
14 out of 14 
1 out of 12 
1 out of 832,812 Years Active: 1989-1993
Title: The Innovative Contributions of Francis U Hill
Introduction
Francis U Hill is a notable inventor based in San Diego, CA, with a remarkable portfolio of 16 patents. His work primarily focuses on advanced materials and manufacturing processes, showcasing his expertise in the field of engineering and innovation.
Latest Patents
Among his latest patents, Hill has developed a method and apparatus for manufacturing dimpled structures from elastic materials. This innovative method involves forming complex polyimide foam shapes by impregnating a low-density, open-cell, reticulated foam with a polyimide foam precursor. The combination is placed in a mold, closed, and then heated to the foaming and curing temperatures of the precursor. As the powdered precursor expands, it spreads throughout the reticulated foam, resulting in a product with substantially uniform density and polyimide foam characteristics. Additionally, radar-absorbing materials can be incorporated into the reticulated foam, ensuring that the final product possesses uniformly distributed radar-absorbing components with desirable high-temperature resistance.
Another significant patent by Hill is related to polyimide foam-filled structures, such as honeycomb panels. In this process, a polyimide foam precursor is prepared in powder form and heated to a resin condensation temperature, where it is pre-cured to a stiff and inflexible state. A multi-cell, thin-walled structure is then pressed into the foam sheet, allowing foam pieces to fill the cells. The foam is subsequently heated to a final cure temperature, resulting in a stable, resilient, and flexible product.
Career Highlights
Throughout his career, Francis U Hill has worked with various companies, including Sorrento Engineering, Inc. His contributions to the field have been instrumental in advancing manufacturing techniques and materials science.
Collaborations
Hill has collaborated with notable individuals such as Lola E Crosswhite and Paul F Schoenzart, further enhancing his innovative endeavors.
Conclusion
Francis U Hill's contributions to the field of engineering and materials science are significant, with a focus on innovative manufacturing processes and advanced materials. His patents reflect a commitment to pushing the boundaries of technology and improving product performance.