John A Haefner

Title: The Innovations of John A. Haefner

Introduction

John A. Haefner is a notable inventor based in Rush, NY (US), recognized for his contributions to the field of photographic technology. He holds a total of 4 patents, showcasing his innovative spirit and dedication to advancing photographic processes.

Latest Patents

Haefner's latest patents include significant advancements in photographic emulsions. One of his inventions, titled "Iridium and bromide in silver halide grain finish," provides a process for incorporating iridium into silver chloride or silver chlorobromide emulsions. This process involves the addition of an iridium salt along with or followed by the addition of bromide to the emulsion after the precipitation stage of emulsion manufacture. The invention also encompasses the formed emulsions and photographic elements comprising these emulsions. Another notable patent is "Photographic emulsions containing internally modified silver halide," which discloses silver halide emulsions comprised of radiation-sensitive silver halide grains. These grains exhibit a face-centered cubic crystal lattice structure and contain a nitrosyl or thionitrosyl coordination ligand along with a transition metal chosen from groups 5 to 10 of the periodic table.

Career Highlights

John A. Haefner has made significant contributions to the Eastman-Kodak Company, a leader in imaging technology. His work has played a crucial role in enhancing the quality and performance of photographic materials.

Collaborations

Throughout his career, Haefner has collaborated with esteemed colleagues such as Herbert S. Wilgus and Robert E. Booms. These partnerships have fostered innovation and contributed to the development of advanced photographic technologies.

Conclusion

John A. Haefner's inventive contributions to photographic technology have left a lasting impact on the industry. His patents reflect a commitment to innovation and excellence in the field of imaging.