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:
Mar. 22, 1994
Filed:
Apr. 16, 1993
Robert J Gilliland, W. Willington, CT (US);
Earl A Williams, Stevensville, MI (US);
USM Corporation, Wilmington, MA (US);
Abstract
For under hood sound-deadening of vehicles a molded sheet (14) of impregnated non-woven fabric sheet material having a weight in the range 0.5 to 0.75 kg/m.sup.2 and a density in the range of 350 to 425 kg/m.sup.3 is used. The material includes a blend of polyester staple fibers having an average decitex in the range 2.5 to 4.0 dtex typically 3.2 dtex. The impregnant includes 10 to 35% by dry weight carboxylated styrene-butadiene copolymer in which the styrene content is not less than 55%, 5 to 10% by dry weight carboxylated styrene-butadiene copolymer in which the styrene content is not more than 50%, 50 to 70% by dry weight mineral filler, and up to 3.5% by dry weight melamine formaldehyde resin. Pigment may also be added. The fabric sheet material is preferably clipped to the hood underside to provide a small air gap between the material and the hood, but alternatively the sheet material may be bonded by adhesive to the hood underside.