David L Chang

Title: The Innovative Contributions of David L. Chang

Introduction

David L. Chang is a notable inventor based in Norwalk, Connecticut, recognized for his significant contributions to the field of chemical compositions. With a total of three patents to his name, Chang has developed innovative solutions that cater to various cleaning and dyeing applications.

Latest Patents

One of Chang's latest patents is a thickened alkali metal hypochlorite composition. This composition includes an alkali metal hypochlorite, a tertiary amine oxide with specific alkyl group configurations, an alkali metal salt, a pH stabilizer, an alkali metal sarcosinate, and a straight-chain alkyl benzene sulfonate. The molar ratio of the components is carefully adjusted to achieve a viscosity between 231 and 402 cps, making it particularly effective for general cleaning purposes, especially in bathrooms and as a laundry additive. Another significant patent is an oxidative hair coloring composition and process for dyeing human hair. This single-stage process allows for the simultaneous application of a composition containing iodide ions, an oxidant, and an oxidation dye, resulting in intense colors when applied to keratinous fibers in an alkaline environment.

Career Highlights

Throughout his career, David L. Chang has worked with reputable companies, including Reckitt & Colman Inc. His work has focused on developing innovative chemical solutions that enhance cleaning and dyeing processes.

Collaborations

Chang has collaborated with notable professionals in his field, including Alexander C. Chan and Yuh-Guo Pan. These collaborations have contributed to the advancement of his innovative projects and patents.

Conclusion

David L. Chang's contributions to the field of chemical compositions through his patents demonstrate his commitment to innovation and problem-solving. His work continues to impact the cleaning and dyeing industries positively.