The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 1981
Filed:
Aug. 15, 1979
John P Franey, Bridgewater, NJ (US);
Thomas E Graedel, Mendham, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
An indicator device useful for detecting H.sub.2 S is disclosed. This detector utilizes a polymer having a permeation constant of at least 5.times.10.sup.-9 cm.sup.3 H.sub.2 S.multidot.cm thickness/(cm.sup.2 area.multidot.sec.multidot.cm Hg) with an incorporated lead containing compound at concentration levels of at least 10 weight percent. These compositions are useful for detecting hydrogen sulfide in concentrations as low as approximately 10 parts per billion by volume, or concentrations of approximately 1 part per million in relatively short periods, e.g., five minutes, and are utilizable for quantitative measurements of H.sub.2 S concentration.