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:
Oct. 08, 1991
Filed:
Dec. 17, 1987
Glenda B Michaels, Gunnison, CO (US);
Walter C Riese, Richmond, TX (US);
Atlantic Richfield Company, Los Angeles, CA (US);
Abstract
Geomicrobiological exploration method employing one or more culture, luminometry or tritiated thymidine assays of microbes (bacteria) for sensitivity, determined as survival rate in percentage, of the microbes to selected toxic materials, preferably heavy metals and/or hydrocarbons. The survival assay values are plotted as contours on a geophysical map and target areas of potential interest are identified and further evaluated by inspection or other techniques. Examples show actual use of the techniques to identify a target area in a raw prospect petroleum lease area which was drilled to successful oil discovery thus proving the method. Sensitivity test incubation ranges from 1-3 hours (preferably 2 hours) for heavy metals at 20-25 degrees C., and 3-10 min. for pentene/hexane at 15-20 degrees C. Luminometry is fastest, being run in 1.5-30 minutes and most suitable for field surveys. Toxics concentrations may range from 0.001 ug/ml to 15,000 ug/ml for heavy metals to 0.001-25 vol % for hydrocarbons.