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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.:

US 5174940 B1

PDFFull Text
Date of Patent:
Dec. 29, 1992

Filed:

Mar. 14, 1991

Method of extruding a single polymeric fiber

Applicant:
Inventors:

Satish Kumar, Duluth, GA (US);

Marilyn Hunsaker, St. Paul, MN (US);

Walter W Adams, Dayton, OH (US);

Thaddeus E Helminiak, Dayton, OH (US);

Assignee:

The United States of America as represented by the Secretary of the Air, , US;

Attorneys:

Sinder; Fredric L.

Singer; Donald J.

Primary Examiner:

James Lowe

Int. Cl.
CPC ...
D01D / ;
U.S. Cl.
CPC ...
264184 ; 2642102 ; 2642108 ;
Abstract

A method and apparatus for making aromatic heterocyclic polymeric fibers having enhanced compressive strength are disclosed. Individual polymeric fibers, while being made according to otherwise conventional methods, are full twisted as they are drawn from a spinnerette hole so that their internal fibrils and microfibrils become entangled. The twisting is performed before coagulation of the fibers. The entangled fibrils and microfibrils are believed to provide mutual support to adjacent fibrils/microfibrils to resist buckling under compression.

Find Patent Forward Citations

Kumar, Satish. (1992). Method of extruding a single polymeric fiber (U.S. Patent No. 5174940). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5174940

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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