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:
Oct. 12, 1993
Filed:
Apr. 10, 1992
Applicant:
Inventor:
Jack D Mackey, Hawthorne, CA (US);
Assignee:
Northrop Corporation, Hawthorne, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G07D / ; C08F / ; G03G / ;
U.S. Cl.
CPC ...
540140 ; 526259 ; 540145 ; 548461 ; 548472 ; 548480 ;
Abstract
A polymer composition having intense magnetic properties and a method for preparation of same. A phthalimide compound and an aromatic dialiphatic acid are reacted in the presence of a metal catalyst at elevated temperatures to form a phenylenebis diphthalimidine compound. The phenylenebis diphthalimidine compound is then reacted with 3-benzylidine phthalimidine and a metal salt of an aliphatic acid at elevated temperatures under an inert gas to form the intensely magnetic polymer. The reactions may be carried out in the presence of a solvent.