Self-cleaning pencil
US6722803B2 · kind B2 · utility
1Cited by
5References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 25, 2002 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Nov 25, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA45D2040/208
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A pencil includes a writing element; and an envelope in surrounding relationship to the writing element. The envelope defines with the writing element a pencil tip and is constructed to include a cleansing material for effecting a spontaneous cleaning of the pencil tip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.