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:
Sep. 11, 1990
Filed:
Jan. 24, 1989
Applicant:
Inventor:
Harry V Samuelson, Chadds Ford, PA (US);
Assignee:
E. I. duPont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D02G / ;
U.S. Cl.
CPC ...
428398 ; 21050023 ; 428376 ; 26417714 ;
Abstract
A hollow fiber with a plurality of members projecting from its outer surface in an arc turned back on itself is formed from a spinneret having a segmented orifice wherein each segment comprises a first portion in the form of an arc curved about the center of the orifice, a second portion extending from the first and connected to a third portion which is in the form of a reverse curve with respect to the first.