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. 22, 1990
Filed:
Nov. 28, 1988
Applicant:
Inventor:
Gary C Welsh, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65D / ; B32B / ;
U.S. Cl.
CPC ...
428 357 ; 428215 ; 428516 ; 428520 ; 4284758 ; 4284761 ;
Abstract
A rigid thermoformable packaging material is provided which includes an outer layer of a nonfoamed oriented polystyrene and an inner layer of a functional polymer resin. The laminated packaging material can be produced by either thermal lamination or coextrusion. The packaging material is readily thermoformed into containers for medical or dental products or foods and is heat sealable, tough, resistant to chemicals, and resistant to cracking and tearing during handling by thermoforming equipment.