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:
Nov. 07, 1989
Filed:
May. 27, 1988
Applicant:
Inventors:
John C Schubert, Marietta, GA (US);
Edward C Leduc, Marietta, GA (US);
Assignee:
Amoco Corporation, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
156 69 ; 156 83 ; 220902 ; 229 / ; 264321 ; 428913 ;
Abstract
The method of improving the stiffness of a polystyrene foam cup having a generally closed cell foam sidewall and bottom and a solid plastic film coating on at least the outer surface thereof comprising placing said cup around a heated mandrel, said mandrel having an outside diameter sufficiently less than an inside diameter of said cup to allow the cup sidewall to expand, at a temperature and for a time sufficient to expand the sidewall.
Schubert, John. (1989). Heating of a foam cup to increase stiffness (U.S. Patent No. 4878970). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4878970
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile