Writing instrument
US11766887B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 2021 |
| Grant date | Sep 26, 2023 |
| Priority date | — |
| Expiry date | Aug 27, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/17
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An erasable ink writing instrument comprising a body extending along an axis, the body having a first end and a second end opposed to the first end along the axis, the first end being provided with a writing tip and with an eraser, wherein the writing tip is fed with erasable ink, wherein the writing tip is fixed with regard to the body and the eraser is movable along the axis with regard to the body, and the erasable ink writing instrument further comprising a helical-cam propelling mechanism configured to move the eraser along the axis between a retracted position and a protruding position. The erasable ink is a peelable ink and the eraser is a friction body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.