Patents by Inventor RICHARD JOHN BURFORD

RICHARD JOHN BURFORD has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • PHOTOCHROMIC AND ELECTROCHROMIC DIARYLETHENE COMPOUNDS WITH IMPROVED PHOTOSTABILITY AND SOLUBILITY
    Publication number: 20220220100
    Abstract: A diarylethene compound reversibly convertible under photochromic and electrochromic conditions between a ring-open isomer of Formula (1A) and a ring-closed isomer of Formula (IB) wherein R5 is a substituted phenyl ring and Re is a substituted thiophene ring is provided. The photochromic-electrochromic diarylethene compound of Formula (1A)/(1B) have improved photochromic, electrochromic or photochromic and electrochromic properties, and is useful to provide variation of the light transmission properties of optical filters. The compound also possesses improved solubility making it suitable for incorporation in commercial products.
    Type: Application
    Filed: April 2, 2020
    Publication date: July 14, 2022
    Applicant: SWITCH MATERIALS INC.
    Inventors: SHAO-KAI CHEN, RICHARD JOHN BURFORD, AMIR MAHMOUD ASADIRAD, TUOQI WU, JAMES DANIEL SENIOR, NATALIE ELAINE CAMPBELL, GLEN RAMSAY BREMNER, NEIL ROBIN BRANDA, JEREMY GRAHAM FINDEN