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. 05, 2002
Filed:
Nov. 09, 1999
Applicant:
Inventors:
Assignee:
Rheinbraun Aktiengesellschaft, Köln, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 1/200 ; E03B 3/12 ;
U.S. Cl.
CPC ...
E21B 1/200 ; E03B 3/12 ;
Abstract
The invention is a well pipe with longitudinal rods arranged in intervals in the pipe wall over the whole circumference. It is characterized by the fact that the well pipe is made of polymer concrete, and of an additional layer of packed gravel functioning as a filter if designed as a well filter pipe, and that the rods are glass fiber rods which transfer axial tensile load.