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:
Jun. 17, 1997
Filed:
Nov. 22, 1995
Thomas M Christy, Salina, KS (US);
Kejr Engineering, Inc., Salina, KS (US);
Abstract
A permeable membrane sensor probe has a housing with a gas permeable membrane. The membrane has an outer surface and an inner surface. The membrane outer surface is disposed adjacent an outer soil engaging surface of the housing. The membrane is adapted to allow the gas phase of at least one particular chemical compound found in the soil to permeate through the membrane from the membrane outer surface to the membrane inner surface while substantially preventing the transfer of liquids and solids found in the soil through the membrane. A gas detecting arrangement is disposed adjacent the membrane inner surface and inside of the housing. This detection system detects the presence of a particular compound at different soil levels.