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:
Dec. 20, 1988
Filed:
Feb. 13, 1987
Applicant:
Inventor:
Gerald E Wynn, El Cajon, CA (US);
Assignee:
James Hardie Irrigation, Inc., Laguna Niguel, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
138146 ; 138137 ;
Abstract
A tube having an elongated core composed of a flexible narrow molecular weight distribution first polymeric composition, a sheath composed of a broader molecular weight second polymeric composition co-extruded over the outer core surface, and a liner composed of a broader molecular weight distribution second polymeric composition co-extruded over the inner core surface. The core may be composed of a composition exhibiting relative poor processability, and the sheath and liner of a composition exhibiting better processability.