Patent · US Expired

Use of compounds which absorbs and fluoresce in the IR range as crack-detecting agents

US5554318A · kind A · utility

8Cited by

8References

5Claims

0Family size

Assignee

BASF SE

Inventors

Peter Neumann · Wiesloch, DE
J urgen Kipper · Karlsruhe, DE
Bernhard Albert · Monsheim, DE
Gerhard Wagenblast · Wachenheim, DE

Key dates

Filing date	Jan 27, 1995
Grant date	Sep 10, 1996
Priority date	—
Expiry date	Jan 27, 2015

Classification

Technology area (CPC G)Physics
CPC primaryG01N21/91
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Compounds from the class consisting of the phthalocyanines, naphthalocyanines, the aminium compounds of aromatic amines, the methine dyes or the azulenesquaric acid dyes, which have their absorption maximum in the range from 600 to 1,200 nm and a fluorescence maximum in the range from 620 to 1,200 nm, are used as crack-detecting agents.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.