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. 13, 1989
Filed:
Feb. 25, 1987
Applicant:
Inventor:
Teh-Chuan Wang, Parkersburg, WV (US);
Assignee:
E. I. Du Pont De Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01F / ;
U.S. Cl.
CPC ...
264134 ; 264174 ; 2642108 ; 26421115 ;
Abstract
Oriented polymeric monofilaments having a diameter of at least about 60 mils and excellent uniformity in roundness, are prepared in which a core of semi-crystalline linear condensation polymer is melt extruded, quenched to a substantially void-free condition, coated with additional polymer to increase the diameters by about from 10 to 100 mils, quenched to a substantially void-free condition, and oriented by drawing about 3.5 times its original length within the orientation temperature range of the polymer.