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:
Jun. 10, 1986
Filed:
Oct. 11, 1983
Applicant:
Inventors:
Alfred Schad, Wiesbaden, DE;
Klaus Heyse, Bad Soden, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
237 56 ; 138141 ; 138144 ;
Abstract
A plastic pipe comprising an oxygen-impermeable casing, wherein the casing comprises a barrier layer for oxygen, and an adhesive layer adjacent to the circumferential surface of the pipe and attached to the circumferential surface by an sealed bond, wherein the casing surrounds the circumferential surface on all sides, and wherein the barrier layer is elastic, is substantially impermeable to oxygen and comprises a polyvinyl alcohol, a vinyl alcohol/ethylene copolymer, or polyacrylonitrile. Also disclosed is a process for the production of the pipe and a use of the pipe as a heating pipe.