Patent Number: 7,465,693

Title: Thermochromatic temperature marking for outdoor surfaces

Abstract: The present invention relates to a system, method, and composition for a thermochromatic, color indicative sheet or device that is bonded to an article such as a concrete or asphalt surface, a traffic sign, a plate of a guidepost and on which is indicated a surface temperature near or below the freezing point of water. The invention can also utilize an adhesive system including a pressure sensitive adhesive (PSA) and/or thermal sensitive adhesive sheet for adhering sheets of preformed thermoplastic with the thermochromatic color indicative sheet to concrete, asphalt, wood or composite material surfaces. The invention includes methods of applying the product allowing for immediate use in a traffic area upon completion of the application to any appropriate outdoor surface.

Inventors: Greer; Robert F. (Lexington, NC), Cady; Alexander F. (Greensboro, NC)

Assignee: Flint Trading, Inc.

International Classification: B41M 5/20 (20060101); B41M 5/24 (20060101)

Expiration Date: 2021-12-16 0:00:00