Firestone Building Products employees receive patents
John Letts, an insulation scientist, and Tim Tackett, an insulation engineer, who are employed by Firestone Building Products Co. LLC, Indianapolis, have earned U.S. Patent 7,387,753Method and Apparatus to Monitor the Compressive Strength of Insulation Boards.
The patent is the first awarded to Tackett and sixth awarded to Letts. It provides a method for producing foam insulation board as part of a continuous process. During the process, the product's compressive strength is monitored online along at least one of its trimmed edges, allowing adjustments to be made during the product's formation in light of data obtained.