John W Reeves

Title: John W. Reeves and His Photothermographic Patents.

Introduction

John W. Reeves is an inventor associated with Rochester, New York, and Eastman Kodak Company. His work includes inventions in photothermographic silver halide materials and image-forming processes. He is credited with 3 patents.

Latest Patents

Photothermographic Element and Process. This invention describes a method for improving the latent-image stability of a photothermographic element. The method adds an alkyl carboxylic acid containing 8 to 22 carbon atoms to a layer containing photosensitive silver halide, then uniformly heats the element before exposure. The element combines photosensitive silver halide and an oxidation-reduction image-forming system in a polymeric binder. After exposure, heating the element to a moderately elevated temperature produces a visible image.

Photothermographic Silver Halide Material and Process. This invention uses thin tabular photosensitive silver halide grains with an average thickness below 0.3 microns. The grains can improve spectral sensitization and image tone in photothermographic materials. After exposure, the image is developed by heating the material, for example, to a temperature between approximately 90°C and 180°C.

Career Highlights

Reeves’s listed patent work focuses on photothermographic technology, in which light exposure and subsequent heating produce a visible image. His inventions address material composition, latent-image stability, spectral sensitization, and image tone.

Collaborations

Reeves is identified as a coworker of Edward L. Dedio. Both are associated with Eastman Kodak Company.

Conclusion

John W. Reeves’s patent contributions reflect work on improving photothermographic materials and processes, particularly their image stability and image quality.