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:
Aug. 15, 1978
Filed:
Aug. 13, 1976
Applicant:
Inventors:
John F Scamehorn, Ponca City, OK (US);
David V Porchey, Ponca City, OK (US);
Assignee:
Continental Oil Company, Ponca City, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
528483 ; 526344 ; 528480 ;
Abstract
A method for reducing the vinyl halide content of polyvinyl halide, in particle form, containing vinyl halide, to a preselected level is disclosed. Briefly, the method comprises: (a) determining the threshold temperature corresponding to said preselected level of vinyl halide, and (b) purging the polyvinyl halide containing vinyl halide with an inert gas heated to a temperature of at least the determined threshold temperature until the vinyl halide content of the polyvinyl halide reaches said preselected level.