Patent · US Expired

Carpet yarn having hollow filament cross-sections containing four continuous voids

US5279897A · kind A · utility

13Cited by

4References

6Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Michael T. Goodall · Landenberg, US
Craig A. Jackson · Covington, US
Perry H. Lin · Seaford, US

Key dates

Filing date	Oct 30, 1992
Grant date	Jan 18, 1994
Priority date	—
Expiry date	Oct 30, 2012

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2975
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A carpet yarn containing continuous synthetic filaments having a four sided cross-sectional contour and four substantially equispaced continuous voids are disclosed. The voids have a substantially round or nonround shape, and each void is substantially centered on a side of the filament's contour.

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