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:
Mar. 14, 1989
Filed:
Apr. 03, 1987
Applicant:
Inventors:
Assignee:
Atochem, , FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264 80 ; 264150 ; 2642094 ; 2642097 ; 264235 ; 264346 ; 264348 ; 425 71 ; 425325 ; 4253791 ;
Abstract
An extruded thermoplastic polymer conduit having a conduit wall of substantially uniform crystalline morphology through the entire thickness thereof free of any oriented surface zone is formed by heating to melt the surface zone and cooling to recrystallize the surface zone.