Patent · US Expired

Humidity sensing and measurement employing halogenated organic polymer membranes

US4681855A · kind A · utility

18Cited by

7References

30Claims

0Family size

Assignee

Government of the United States of America, as represented by the Secretary of Commerce · US

Inventor

Peter Huang · New York, US

Key dates

Filing date	Aug 5, 1985
Grant date	Jul 21, 1987
Priority date	—
Expiry date	Aug 5, 2005

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/0423
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Thin films of hygroscopic, halogenated organic polymer having pendant groups of a relatively strong acidic type (e.g., sulfonic groups) and pendant groups of a relatively weak acidic type (e.g., carboxylic groups) are employed for humidity sensing by electronic, acoustic, and optical techniques.

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