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:
Mar. 09, 1993
Filed:
Aug. 30, 1991
Applicant:
Inventor:
Thomas J Landsberg, Princeton, NJ (US);
Assignee:
Simmons-Rand Company, Bristol, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D / ;
U.S. Cl.
CPC ...
4052591 ; 4052593 ; 4053021 ;
Abstract
An open seam friction rock stabilizer having a compressible body with portions alternately in contact with and not in contact with borehole wall, the contacting portions being separated by an angle between 70 degrees and 150 degrees.