Norman D Ligtenberg

Title: The Innovations of Norman D. Ligtenberg

Introduction

Norman D. Ligtenberg is a notable inventor based in Cottage Grove, MN (US). He has made significant contributions to the field of retroreflective materials, particularly through his innovative patent. His work has implications for various applications, especially in enhancing visibility and safety.

Latest Patents

Ligtenberg holds a patent titled "Dielectric mirror retroreflective appliques having excellent repetitive laundering performance." This invention features exposed lens retroreflective appliques that incorporate a monolayer of beads and a dielectric mirror positioned near the beads. The design includes a pigmented or colored bead bond layer, which is partially embedded and visible through the dielectric mirror, providing a vibrant appearance during the day. The appliques are engineered to maintain at least 75% of their initial reflectivity after undergoing fifty home laundering cycles, with many retaining at least 90%. The dielectric mirror can consist of materials such as zinc sulfide and calcium fluoride or silicon dioxide, optimizing the reflectivity and durability of the appliques.

Career Highlights

Ligtenberg is associated with 3M Innovative Properties Company, where he has been able to leverage his expertise in materials science. His work at 3M has allowed him to collaborate with other talented professionals in the field, contributing to advancements in reflective technologies.

Collaborations

Some of Ligtenberg's notable coworkers include Jeanine M. Shusta and William B. Robbins. Their collaborative efforts have likely played a role in the development and refinement of innovative products at 3M.

Conclusion

Norman D. Ligtenberg's contributions to the field of retroreflective materials exemplify the impact of innovation on safety and visibility. His patent reflects a commitment to enhancing product performance through advanced materials technology.