Color-developing agents and color-developing sheets
US5647896A · kind A · utility
12Cited by
7References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1995 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | Oct 30, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/155
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Provided are a color-developing agent comprising a multivalent metal salt of a salicylic acid derivative and a sulfonated phenol and/or a metal salt thereof and having excellent initial and ultimate color-developing capacities and improved waterproofness; and a color-developing sheet making use of the color-developing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.