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:
Jun. 30, 1987
Filed:
Dec. 23, 1985
Applicant:
Inventors:
Theodore C Wallace, Midland, MI (US);
Janet M Streif, Farley, IA (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264 401 ; 15624411 ; 264 402 ; 264 78 ; 425135 ; 425141 ; 425169 ;
Abstract
The thickness of the barrier layer in coextruded multilayer, thermoformable resinous sheet material is controlled by transverse color monitoring during coextrusion of the sheet.