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. 03, 2008
Filed:
Dec. 18, 1997
Applicants:
Kari Kirjavainen, Espoo, FI;
Jyri Järvenkylä, Hollola, FI;
Inventors:
Kari Kirjavainen, Espoo, FI;
Jyri Järvenkylä, Hollola, FI;
Assignee:
Uponor B.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B 1/08 (2006.01); B32B 15/085 (2006.01); B32B 5/18 (2006.01); B32B 5/20 (2006.01); B32B 7/12 (2006.01); B32B 27/32 (2006.01); F16L 9/01 (2006.01); F16L 9/12 (2006.01); F16L 9/133 (2006.01); F16L 9/147 (2006.01); F16L 55/18 (2006.01); F16L 21/00 (2006.01); E21D 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A tubular product has a tubular base layer, a tubular innermost layer made of plastic by continuous extrusion, and a tubular tie layer of foamed plastic between and adhered to the base layer and the innermost layer. The tie layer is made of melt processable adhesion plastic, is extruded simultaneously with the innermost layer against the base layer, and has better adhesions to the base and innermost layers than the base and innermost layers have to each other.