Patent · US Active

Writing, drawing, marking and/or cosmetic device

US11370244B2 · kind B2 · utility

0Cited by

2References

11Claims

0Family size

Assignee

STAEDTLER MARS GMBH & CO. KG · DE

Inventors

Peter Weiss · Neuss, DE
Michael D. Schulze · Troy, US

Key dates

Filing date	Sep 12, 2018
Grant date	Jun 28, 2022
Priority date	—
Expiry date	Jun 5, 2039

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2103/32
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A writing, drawing, marking and/or cosmetic device, wherein the device includes at least one shaft and at least one inner body, wherein the at least one shaft is formed from concrete-containing material. The shaft at least partially surrounds the inner body. In the installation position the shaft is secured in an axial direction against axial displacement by a closing cover and a front part and a prestress is formed in the shaft in the axial direction via the closing cover and the front part.

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