Color-change and erasable writing compositions, writing instruments, and systems
US11866603B2 · kind B2 · utility
0Cited by
17References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2020 |
| Grant date | Jan 9, 2024 |
| Priority date | — |
| Expiry date | Nov 12, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D9/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention provides writing compositions that are capable of being erased or changed in color chemically. The present invention also provides erasing media for erasing or changing the color of marks produced with the writing compositions, as well as writing systems and incorporating the erasing media and the writing compositions. The present invention further provides writing instruments produced using the writing compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.