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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.:

US 6837950 B1

PDFFull Text
Expired
Date of Patent:
Jan. 04, 2005

Filed:

Jul. 20, 2001

Separation of floor covering components for recycling

Applicant:

Raymond A. Berard, Kennesaw, GA (US);

Inventor:

Raymond A. Berard, Kennesaw, GA (US);

Assignee:

Interface, Inc., Atlanta, GA (US);

Attorneys:

Kilpatrick Stockton LLP

John S. Pratt

Bruce D. Gray

Primary Examiner:

J A Lorengo

Int. Cl.
CPC ...
B32B 3500 ; B32B 504 ; D05C 1500 ; C08J 1118 ; C08F29906 ;
U.S. Cl.
CPC ...
Abstract

The invention relates to methods for processing floor coverings (), such as carpet and/or carpet tile, having at least one layer containing a polyurethane (), such that at least this polyurethane—containing layer () can be recycled and reused. The method involves contacting the floor covering () with an organic polyol () and heating () it, so that the polyurethane—containing layer () softens and/or partially liquefies, but can be resolidified by contact with additional polyisocyanate ().

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Berard, Raymond. (2005). Separation of floor covering components for recycling (U.S. Patent No. 6837950). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6837950

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