The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 12, 2010
Filed:
Aug. 22, 2006
Charles K. Buehler, Warren, MI (US);
Charles C. Mentzer, Beverly Hills, MI (US);
Michael P. Balogh, Novi, MI (US);
Catherine A. Ostrander, Grand Blanc, MI (US);
Steven J. Schmidt, Holly, MI (US);
Charles K. Buehler, Warren, MI (US);
Charles C. Mentzer, Beverly Hills, MI (US);
Michael P. Balogh, Novi, MI (US);
Catherine A. Ostrander, Grand Blanc, MI (US);
Steven J. Schmidt, Holly, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A thermoforming methodology for laminated thermoplastic sheets which preserves the class 'A' finish and high gloss thereof. In a thermoforming process including heating followed by vacuum and opposing air pressure application, and then followed by application of chilled compressed air, control of spherulite formation using any of: addition of a nucleating agent to the paint film, using the chilled compressed air at a temperature of substantially about 32° F., heating to no more than about 311° F., selecting a paint film having a high melting point temperature, and selecting a paint film that is non-crystalline.