Kwok-Shun Cheng

Title: Innovations and Contributions of Kwok-Shun Cheng in Filtration Technologies

Introduction

Kwok-Shun Cheng is a prominent inventor based in Nashua, NH, with an impressive portfolio of 23 patents. His work primarily focuses on advancements in filtration technologies, particularly in the development of hollow fiber membranes and depth filter media. His innovative contributions have significantly impacted various industries, enhancing the efficiency and effectiveness of filtration processes.

Latest Patents

Among Kwok-Shun Cheng's latest patents is the invention titled **"Highly retentive polyamide hollow fiber membranes produced via controlled shrinkage."** This patent details a polyamide hollow fiber membrane that exhibits remarkable isopropanol permeability, ranging from approximately 5 L/m2 h bar to about 150 L/m2 h bar. Additionally, the membrane boasts a rejection rate of 100% for particles with a nominal diameter between 1 nm and 25 nm. These membranes are particularly advantageous for photoresist filtration applications.

Another noteworthy invention by Cheng is the **"High capacity composite depth filter media with low extractables."** This patent describes a depth filtration device designed to clarify biological fluids. It features a composite filter media composed of a nonwoven first layer integrated with a second layer containing polyacrylonitrile (PAN) fibers, along with a filter aid and wet-strength resin. This innovative filter media is engineered to capture soluble impurities like DNA and host cell proteins while minimizing flushing requirements and reducing extractables, making it valuable in the manufacturing processes for monoclonal antibodies.

Career Highlights

Kwok-Shun Cheng has garnered considerable experience working with esteemed companies such as Emd Millipore Corporation and Mykrolis Corporation. His contributions to these organizations reflect his expertise in filtration technologies, underscoring his status as an influential figure in his field.

Collaborations

Throughout his career, Cheng has collaborated with notable colleagues, including Cha Doh and Rajnikant B Patel. These collaborations have further enriched his research and innovation efforts, fostering an environment of shared knowledge and technical advancement in filtration technology.

Conclusion

Kwok-Shun Cheng's inventive spirit and technological advancements in filtration systems have positioned him as a key player in the industry. His continued research and development efforts hold immense potential for improving filtration processes across various applications. With his substantial patent portfolio, Cheng is set to make a lasting impact on the field of filtration technologies.