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:
May. 20, 1980
Filed:
Jul. 06, 1976
Applicant:
Inventors:
Edward L Burnett, Bay City, MI (US);
Eugene V Stack, Bay City, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B27J / ;
U.S. Cl.
CPC ...
264127 ; 264331 ;
Abstract
Polytetrafluoroethylene tubes are prepared by isostatic molding of polytetrafluoroethylene powder over a cylindrical mandral at a temperature below about 19.degree. C. The compacted preform and mandrel are then warmed to a temperature above about 19.degree. C. and the preform removed from the mandrel. Sticking of the preform to the mandrel is avoided.