Patent 6484340 Issued on November 26, 2002. Estimated Expiration Date: March 27, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
The invention relates to a mattress core made from foamed material, latex, or plastic being provided with a series of hollow spaces (2) running perpendicular to its longitudinal axis. According to the invention, it is provided that coil springs (3) are positioned in a lying fashion in the hollow spaces (2) running perpendicularly to the longitudinal axis of the foam core (1). Preferably, the coil springs (3) are produced from a tape material and a fibrous composition material and foamed in.