Ink for ball-point pen and ball-point pen using the same
US6562116B1 · kind B1 · utility
9Cited by
8References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 5, 2001 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Mar 5, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink for a ball point comprising at least one organic solvent selected from the group consisting of alcohols and glycol ethers, a resin and a colorant, wherein the spectral reflectance determined in the state where the ink for a ball point pen is filled into an ink reservoir has a maximum value in 500 to 520 nm, and a ratio of maximum strength/minimum strength of the spectral reflectance is 2.2 to 5.5. Further provided is a ball point pen equipped with a transparent ink reservoir charged with the ink, wherein the color of the ink can visually be identified through a part which transmits light in the ball point pen barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.