Refillable free ink writing instrument, kit comprising such a writing instrument, and method thereof
US12030337B2 · kind B2 · utility
0Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2021 |
| Grant date | Jul 9, 2024 |
| Priority date | — |
| Expiry date | Aug 30, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K23/12
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A refillable free ink writing instrument including a body having a rear end, a front end and an ink reservoir disposed between the rear end and the front end, a writing tip mounted on the front end and a plug mounted on the rear end, wherein the plug is configured to close an opening in fluid communication with the ink reservoir, the plug being configured to be removable from the rear end to refill the ink reservoir with water and concentrated ink refill.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.