Patents Examined by Jeffery C. Mullis
  • Impact resistant polyurethane and method of manufacture thereof
    Patent number: 6127505
    Abstract: The present invention is an optically clear, high hardness, impact resistant polyurethane which provides exceptionally high heat distortion temperatures and excellent chemical resistance. The invention is particularly useful for transparency applications that require excellent impact resistance coupled with high heat distortion temperatures, such as architectural glazings vehicles, glazings, riot shields, aircraft canopies, face masks, visors, opthalmic and sun lenses, protective eyewear, and transparent armor.
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: October 3, 2000
    Assignee: Simula Inc.
    Inventor: Edwin C. Slagel