Thermal imaging method
US4745046A · kind A · utility
27Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1986 |
| Grant date | May 17, 1988 |
| Priority date | — |
| Expiry date | May 14, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/165
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal imaging method is provided which employs as color-forming co-reactants, (a) a substantially colorless di- or triarylmethane compound possessing on the meso carbon atom within its triarylmethane structure an aryl group substituted in the ortho position with a nucleophilic moiety which is ring-closed on the meso carbon atom and (b) an electrophilic reagent which upon heating and contacting said di- or triarylmethane compound undergoes a bimolecular nucleophilic substitution reaction with the nucleophilic moiety to form a colored, ring-opened di- or triarylmethane compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.