JoAnn D Hanna

Title: JoAnn D Hanna: Innovator in Photothermographic Systems

Introduction

JoAnn D Hanna is a prominent inventor based in Rochester, NY (US). She has made significant contributions to the field of photothermographic systems, holding a total of 4 patents. Her innovative work focuses on enhancing the performance and efficiency of color photothermographic films.

Latest Patents

One of her latest patents is titled "Method of passivating a silver donor with a dye and photothermographic systems made thereby." This invention is directed to a color photothermographic film in which particles comprising an organic silver salt are treated with a dye that functions as a passivating agent. The invention involves passivating the organic silver salts with a dye that blocks the surface of the organic silver salt or ligand, resulting in a reduction of speed loss. Additionally, it provides a method of making a photothermographic element to improve raw stock keeping. Another notable patent is "Core/shell silver donors for photothermographic systems comprising an oxidatively less reactive shell." This invention comprises a photothermographic element that includes silver halide, a blocked developer, a coupler, and core/shell particles. Each particle consists of a mixture of at least two non-photosensitive organic silver salts, with a center portion made of a non-photosensitive first organic silver salt and a shell portion covering it, which comprises a non-photosensitive second organic silver salt.

Career Highlights

JoAnn D Hanna has built a successful career at Eastman Kodak Company, where she has been instrumental in advancing photothermographic technologies. Her work has not only contributed to the company's innovation portfolio but has also had a lasting impact on the industry.

Collaborations

Throughout her career, JoAnn has collaborated with notable colleagues, including Mark Edward Irving and Gregg P Bryant. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

JoAnn D Hanna is a trailblazer in the field of photothermographic systems, with a strong portfolio of patents that reflect her innovative spirit. Her contributions continue to shape the future of imaging technologies.