John Whittall

Title: Innovations of John Whittall in Photochromic Compounds

Introduction

John Whittall is an accomplished inventor based in Caerphilly, GB. He holds two patents that showcase his innovative contributions to the field of photochromic compounds. His work focuses on developing materials that respond to light, particularly for applications in eyewear.

Latest Patents

Whittall's latest patents include a series of novel photochromic spiropyran compounds. These compounds introduce a spiro-adamantane group into the 2-position of the benzopyran or naphthopyran ring. The spiropyran compounds exhibit heliochromic properties, meaning they change color in sunlight and fade quickly at ambient temperatures without UV light. This makes them ideal candidates for manufacturing sunglasses. His second patent involves photoreactive plastics lenses that are coated or impregnated with adamantane 2-spiro-benzo or naphthopyran. These lenses also darken in sunlight and fade rapidly in the absence of UV light, providing a desirable brown/grey coloration when combined with other coloring compounds.

Career Highlights

John Whittall has made significant strides in the field of materials science through his innovative patents. His work has the potential to revolutionize the eyewear industry by enhancing the functionality and aesthetic appeal of lenses.

Collaborations

Some of his notable coworkers include Harry G Heller and Stephen N Oliver, who have contributed to his research and development efforts.

Conclusion

John Whittall's contributions to the field of photochromic compounds demonstrate his innovative spirit and commitment to advancing technology in eyewear. His patents reflect a deep understanding of materials science and a vision for practical applications that enhance everyday products.