Cheng H Chang

Title: Innovations of Cheng H Chang

Introduction

Cheng H Chang is a notable inventor based in Naperville, IL, who has made significant contributions to the field of pressure-sensitive copy systems. With a total of seven patents to his name, he has developed innovative solutions that enhance the functionality and efficiency of copy systems.

Latest Patents

Among his latest patents, Cheng H Chang has created pressure-sensitive materials that utilize phenolic esters. These materials are designed for use in copy systems, featuring substrates that bear isolated droplets of oily solvents. The inclusion of an acid-sensitive chromogenic compound and a phenolic ester allows for the stabilization of colored markings. This innovative approach ensures that the phenolic compound does not prematurely react with the chromogen, thus maintaining the integrity of the copy system. Additionally, he has developed pressure-sensitive microcapsules containing alkylnaphthalene solvents, which are effective in carbonless copy systems without the need for halogenated solvents.

Career Highlights

Cheng H Chang is currently employed at Champion International Corporation Limited, where he continues to push the boundaries of innovation in copy technology. His work has been instrumental in advancing the capabilities of pressure-sensitive materials, making them more reliable and efficient for various applications.

Collaborations

Throughout his career, Cheng has collaborated with notable colleagues, including David N Vincent and Anthony E Vassiliades. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies in the field.

Conclusion

Cheng H Chang's contributions to the field of pressure-sensitive copy systems exemplify the spirit of innovation. His patents reflect a deep understanding of materials science and a commitment to enhancing the functionality of copy technologies. His work continues to influence the industry and inspire future advancements.