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:
Dec. 30, 2003
Filed:
Apr. 06, 2000
Applicant:
Inventors:
Stephen Patrick Harrison, Yarm, GB;
William David Parten, Nr. Stokesley, GB;
Joseph Youngblood Stuart, Baton Rouge, LA (US);
John Stuart Martin, Northwich, GB;
Assignee:
Lucite International UK Limited, Southampton, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 6/748 ;
U.S. Cl.
CPC ...
C07C 6/748 ;
Abstract
A process for the manufacture of methyl methacrylate includes a process for separating the methyl methacrylate from certain impurities, at least one of which has a freezing point of greater than −50° C., by a fractional crystallisation process.