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. 12, 1989
Filed:
Sep. 14, 1988
Applicant:
Inventor:
David R Stewart, Richmond, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65D / ;
U.S. Cl.
CPC ...
220468 ; 220469 ;
Abstract
A plastic container having enhanced insulation is made from a partially-laminated billet having a laminated outer periphery and gas trapped between the unlaminated portion of the billet layers, by heating the billet to a temperature below the softening point of at least one of the layers, which expands the gas trapped between the layers and separates the unlaminated layers. The billet is then clamped about its outer periphery and drawn into the shape of the container using solid-phase forming techniques. The separated layers insulate the contents of the container from the surrounding environment.