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:
Jun. 30, 1987
Filed:
Mar. 03, 1986
David S Brown, Manor Township, Lancaster County, PA (US);
John S Forry, Manor Township, Lancaster County, PA (US);
Nancy E Mentzer, Lancaster, PA (US);
Donald J Misselhorn, East Hempfield Township, Lancaster County, PA (US);
Armstrong World Industries, Inc., Lancaster, PA (US);
Abstract
The present invention relates to laminated acoustical tile products which are derived from compositions that are suitable to provide rigid, water-resistant phosphate ceramic materials. The tile products comprise a decorative facing comprising a substantially open-celled character and a backing layer of higher density, the backing layer and edges of the tile comprising substantially closed-celled facing characteristics. The backing layer provides structural strength and dimensional stability to the tile product whereas the decorative, open-celled facing provides access by sound waves to the interior regions of the board. The resulting composite material provides good acoustical performance, yet is capable of withstanding conventional handling stresses.