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:
Feb. 15, 1977
Filed:
Dec. 11, 1975
Applicant:
Inventors:
Anthony John Park, South Croydon, EN;
Brian Weeks, Epsom, EN;
Assignee:
The British Petroleum Company Limited, London, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
528503 ; 526344 ;
Abstract
The residual vinyl halide content of vinyl halide polymer is reduced by radiofrequency dielectric heating of a water-containing layer of particulate polymer over which is disposed a layer of material through which vinyl chloride can pass but which restricts the passage of water e.g. perforated plastic sheet.