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:
Sep. 13, 1994
Filed:
Mar. 11, 1993
Applicant:
Inventor:
Bruno Bernhardt, Reutlingen, DE;
Assignee:
IEG Industrie-Engineering GmbH, Reutlingen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
73155 ;
Abstract
A measurement of geohydraulic permeability of ground regions is performed by producing a negative pressure in a well shaft and a measuring of the resulting raise or lowering of the ground water level in the well shaft without pumping out of ground water from the shaft.