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:
Dec. 16, 1997
Filed:
Dec. 07, 1995
Applicant:
Inventors:
Jerry R Weidner, Iona, ID (US);
Wayne C Downs, Sugar City, ID (US);
Timothy G Kaser, Ammon, ID (US);
H James Hall, Idaho Falls, ID (US);
Assignee:
Lockheed Idaho Technologies Company, Idaho, ID (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B09C / ; E21B / ; E21B / ;
U.S. Cl.
CPC ...
166 52 ; 166268 ; 166325 ; 166370 ; 405128 ;
Abstract
A system extracts contaminated vapors from soil or other subsurface regions by using changes in barometric pressure to operate sensitive check valves that control air entry and removal from wells in the ground. The system creates an efficient subterranean flow of air through a contaminated soil plume and causes final extraction of the contaminants from the soil to ambient air above ground without any external energy sources.