Method for detecting vapor and liquid reactants
US5322797A · kind A · utility
26Cited by
11References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1992 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Jul 24, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/175383
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A paint or coating composition and method for detecting vapor or liquid reactants, such as ammonia. The composition is composed of ethyl cellulose as a binder, a filler, such as amorphous silica, and a dye, such as bromophenol blue. The composition serves as a passive detector for vapor or liquid reactants when applied to selected surfaces as a paint. The composition is capable of detecting extremely low concentrations of vapor. Further, the composition is capable of regenerating to its original color, thereby providing repeated detection capability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.