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. 20, 1995
Filed:
Nov. 10, 1992
Applicant:
Inventors:
Joachim Mugge, Haltern, DE;
Stefan Rober, Marl, DE;
Assignee:
Huels Aktiengesellschaft, Marl, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
138137 ; 428 357 ; 428 369 ; 428 3691 ; 4284744 ; 4284752 ; 138174 ;
Abstract
A multilayer plastic pipe having improved barrier action against diffusion of the substance being transported, particularly methanol-containing fuels, dimensional stability, and resistance to mechanical stress, is provided comprising: an inner layer and an outer layer, each of which comprise a polyamide-based molding composition, wherein the inner layer and outer layer may be the same or different, and at least one intermediate layer comprising a linear, crystalline polyester-based molding composition interposed between and bonding together the inner and outer layers.