Patent · US Expired

Use of test strips to determine the UV intensity or to pre-determine the duration of stay in the sun without sunburn

US5589398A · kind A · utility

84Cited by

12References

7Claims

0Family size

Assignee

Boehringer Mannheim GmbH · DE

Inventors

Manfred Krause · Ginsheim-Gustavsburg, DE
Norbert Kaufmann · Ruppertsberg, DE
Mathias Neumann · Nideggen, DE

Key dates

Filing date	Nov 15, 1994
Grant date	Dec 31, 1996
Priority date	—
Expiry date	Nov 15, 2014

Classification

Technology area (CPC G)Physics
CPC primaryG01J1/50
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention concerns the use of test strips with a flat, preferably oblong foil which carries a matrix containing a photoactive chromogenic substance to pre-determine the duration of stay in the sun that is possible without sunburn, a test system for this determination containing test strips and a test strip pack, a test strip pack and a method for the pre-determination of the maximum possible duration of stay in the sun without sunburn using the test system.

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