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. 24, 2006
Filed:
Jul. 02, 2004
Chester Malcolm Dacres, Columbia, MD (US);
John Marshall, Fallston, MD (US);
Dodd V. Ezzard, Flushing, NY (US);
Keegan S. Rodkey, Baltimore, MD (US);
David G. Deik, Olney, MD (US);
Chester Malcolm Dacres, Columbia, MD (US);
John Marshall, Fallston, MD (US);
Dodd V. Ezzard, Flushing, NY (US);
Keegan S. Rodkey, Baltimore, MD (US);
David G. Deik, Olney, MD (US);
Dacco Sci, Inc., Columbia, MD (US);
Abstract
The present invention relates to using a rectifier, a groundbed consisting of four (4) copper rods, power supply, three (3) copper/copper sulfate (Cu/CuSO) reference electrodes, a data logger for detecting and identifying buried lead (Pb) and copper (Cu) service pipes by their electrochemical potentials. More specifically, the present invention relates to using the electrochemical potentials of lead (Pb) versus copper/copper sulfate (Cu/CuSO) reference electrode (−0.500 volts) and also using the electrochemical potentials of copper versus copper/copper sulfate (Cu/CuSO) reference electrode (−0.200 volts) which is utilized under field (actual, environmental or in situ) conditions in detecting and differentiating buried lead (Pb) service pipes and buried copper pipes which are sometimes attached to the same water meter and cast iron water supply main.