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. 16, 1978
Filed:
Apr. 28, 1977
John Maurice Iwasyk, Wilmington, DE (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
An improved polymerization apparatus for finishing high viscosity synthetic polymers involves a vessel having vertical rotating elements which fully wipe the interior surface of the vessel including the top inner surface. Entrances located in the top of the vessel for feeding streams containing molten polymer downwardly into the vessel deposit fresh polymer on the walls and on the upper element surfaces which wipe the top inner surface. A reservoir formed by the leading edge of a raised portion on the upper end surface of the elements facilitates collecting and spreading a fresh supply of polymer on the top inner surface of the vessel to help eliminate stagnant polymer areas thereon during operation.