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. 18, 2007
Filed:
Feb. 12, 2003
Applicants:
Scott John Macgregor, Glasgow, GB;
Steven Mccallum Turnbull, Ontario, CA;
Inventors:
Scott John MacGregor, Glasgow, GB;
Steven McCallum Turnbull, Ontario, CA;
Assignee:
University of Strathclyde, Glasgow, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 7/15 (2006.01);
U.S. Cl.
CPC ...
Abstract
Material is removed from a body of material, e.g. to create a bore hole, by plasma channel drilling. High voltage, high energy, rapid rise time electrical pulses are delivered many times per second to an electrode assembly in contact with the material body to generate therein elongate plasma channels which expand rapidly following electrical breakdown of the material causing the material to fracture and fragment.