Patent · US Active

Stretched aromatic polyethers

US12091783B2 · kind B2 · utility

0Cited by

2References

18Claims

0Family size

Assignee

Evonik Operations GmbH · DE

Inventors

Lan de Gans Li · Mülheim an der Ruhr, DE
Martin Wielpütz · Senden, DE
Markus Hartmann · Neustadt, DE
Dirk Bücker · Ratingen, DE

Key dates

Filing date	Oct 17, 2019
Grant date	Sep 17, 2024
Priority date	—
Expiry date	Apr 21, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2650/40
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Stretched filaments based on aromatic polyethers, wherein the filaments have been stretched at a temperature between glass transition temperature and melting point and wherein the filaments are cooled down to below the glass transition temperature under full tensile load and a process for production thereof and use thereof.

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