Patent · US Expired

Closed cell foamed material having interior canals filled with substances

US4464428A · kind A · utility

22Cited by

10References

17Claims

0Family size

Assignee

Firma Carl Freudenberg · DE

Inventors

Heinrich Ebert · Weinheim, DE
Manfred Noe · Hemsbach, DE
Kurt Wind · Weinheim, DE
Wilhelm Kirsch

Key dates

Filing date	Jul 23, 1982
Grant date	Aug 7, 1984
Priority date	—
Expiry date	Jul 23, 2002

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/249986
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A web of a cross-linked plastic material foamed in a closed-cell structure or configuration, having substantially parallel upper and lower surfaces, wherein canals penetrate the foamed material and extend and open to at least one of said upper and lower surfaces, and wherein substances can be introduced into the canals to impart beneficial properties to the web of foamed material.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.