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:
Aug. 14, 1990
Filed:
Sep. 27, 1989
Applicant:
Inventors:
Richard S Silver, Allentown, PA (US);
Pamela M Bunting, Cheswick, PA (US);
Assignee:
Chevron Research Company, San Francisco, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; C12N / ; C12R / ;
U.S. Cl.
CPC ...
166246 ; 166270 ; 166294 ; 4352536 ;
Abstract
The present invention is a phosphate compound for use in a bacterial nutrient medium. The medium is injected downhole in a petroleum formation along with a bacteria (or its spore) and provides the bacteria with growth nutrients. The nutrient solution contains a phosphate compound which: will not precipitate out of solution under ambient conditions; will chelate alkaline earth, rare earth, transition and heavy metal ions; and provide a nutrient source for the bacteria.