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:
Sep. 03, 2002
Filed:
May. 19, 2000
Applicant:
Inventors:
Mark Griffith Williams, Downers Grove, IL (US);
Larry Clyde Long, Westmont, IL (US);
Owen Joseph Mc Garel, Naperville, IL (US);
Ronald Joseph Jerantowski, Lemont, IL (US);
James Joseph Albert, North Riverside, IL (US);
Assignee:
Viskase Corporation, Willowbrook, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 4/700 ;
U.S. Cl.
CPC ...
B29C 4/700 ;
Abstract
Disclosed is a mandrel structure for extruding a tube composed of a non derivatized cellulose. The mandrel includes a hollow sizing portion having openings which gather gas bubbles that may evolve at the interface between the extruded tube and the sizing portion and allows the gas to pass into the hollow interior of the mandrel.