Pressure sensitive carbonless imaging system incorporating uncolored ferric organophosphates and colored chelates
US4902668A · kind A · utility
17Cited by
13References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Aug 25, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/914
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Pressure sensitive imaging materials are stable until pressure addressed, but thereafter provide an intense dark image. The materials comprise colorless ferric organophosphate, ferric organophosphinate, or ferric organophosphonate and a colored chelate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.