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:
Jan. 29, 1991
Filed:
Feb. 28, 1989
Applicant:
Inventors:
Stephen A Perusich, Newark, DE (US);
James T Keating, Wilmington, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ; B05D / ; D06M / ; D06M / ; D06M / ; D06M / ;
U.S. Cl.
CPC ...
811552 ; 811553 ; 811556 ; 811562 ; 811563 ; 811568 ; 811569 ; 57258 ; 210660 ; 210679 ; 2105001 ; 210508 ; 423D / ; 427 36 ; 427 41 ; 427 44 ; 427 541 ; 427341 ; 427342 ; 4273899 ; 428378 ; 428394 ; 428421 ; 428422 ; 521 31 ; 521 32 ; 521 38 ;
Abstract
A sheath/core yarn having as its core a fluorinated cation exchange resin, oriented at least 1x, in alkali metal salt form and as its sheath an unoriented or oriented melt-fabricable precursor or derivative of the same salt-form fluorinated cation exchange resin. The invention also includes various processes for making the sheath/core yarn.