Nonstaining fingerprint ink and applicator therefor
US6027556A · kind A · utility
5Cited by
6References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1998 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | Sep 29, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A nonstaining fingerprint ink is formulated from one or more alcohol soluble dyes, e.g., Acid Black 5 dye, dissolved in one or more fatty acid esters which have at least one available hydroxyl group, e.g., glycerol monoricinoleate, the dye constituting about 5% of the total ink by weight. An applicator, particularly well suited for the ink, includes a pad made of a melt blown calendared fabric encapsulated in a gas impermeable pouch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.