Phosphorescent materials
US4089995A · kind A · utility
12Cited by
8References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1976 |
| Grant date | May 16, 1978 |
| Priority date | — |
| Expiry date | Dec 7, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31964
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of rendering a surface, especially a paper surface, phosphorescent, in which a composition comprising a phosphorescence activator and a soluble condensation product of formaldehyde and an amino compound is applied to the surface and is allowed to react in situ to form a phosphorescent insoluble condensation product. The composition may, for example, be in the form of a printing ink or a paper-coating mix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.