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. 20, 1983
Filed:
Jan. 10, 1983
Applicant:
Inventor:
Neil I Steinberg, Greer, SC (US);
Assignee:
E. I. Du Pont de Nemours & Co., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264216 ; 425223 ; 425224 ; 425471 ;
Abstract
To increase the rate of production of polyester film in cases where such film is produced by extruding a molten polymer onto the quenching surface of a rotating casting wheel, the shell thickness of the casting wheel is reduced.
Steinberg, Neil. (1983). High capacity polymer quenching on thin shell wheels (U.S. Patent No. 4421709). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4421709
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile