Indicator material
US4328181A · kind A · utility
28Cited by
12References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1979 |
| Grant date | May 4, 1982 |
| Priority date | — |
| Expiry date | Jul 6, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/19
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Indicator material for monitoring personal exposure to hazardous substances in ambient air comprising a pigment material, a binder and a sensitizer coated upon a transparent support member as a porous coating which permits gaseous diffusion throughout the coating is disclosed. Detection or monitoring is effected when the indicator material undergoes a visually observable reaction with hazardous material in the atmosphere at room temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.