Patent · US Active

Refill for writing, drawing and/or painting devices and method for the production thereof

US11434388B2 · kind B2 · utility

0Cited by

4References

5Claims

0Family size

Assignee

STAEDTLER MARS GMBH & CO. KG · DE

Inventors

Andreas Thies · Tirschenreuth, DE
Martin Jakob · Kelkheim, DE
Jürgen Adler · Kleinseebach, DE

Key dates

Filing date	Sep 11, 2014
Grant date	Sep 6, 2022
Priority date	—
Expiry date	Sep 11, 2034

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K3/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A polymer-bound refill for writing, drawing and/or painting devices, in particular for pencils or coloured pencils, including at least one binder, at least one wax, at least one colouring agent and at least one filler. The refill includes polylactide as binder.

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