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:
Aug. 29, 2000
Filed:
Nov. 24, 1997
Applicant:
Inventors:
Jacques Jarrin, Nanterre, FR;
Louis Perrin, Champlan, FR;
Assignee:
Institut Francais du Petrole, , FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L / ; F16L / ; F16L / ; F16L / ;
U.S. Cl.
CPC ...
428 3691 ; 428421 ; 428458 ; 428469 ; 428586 ; 138131 ; 138134 ; 138146 ; 138154 ; 25218828 ;
Abstract
The present invention relates to flexible pipes with metal armors and metal tubes having a sheath made of an extrudable thermoplastic material for manufacturing an acid gas tight barrier. The sheath comprises a determined proportion of at least one charge of a product chemically active with acid gases so as to irreversibly annihilate the corrosive effects of these gases, the proportion being determined as a function of the gas permeability of the thermoplastic material.