US Patent 7351788 Polymer containing substituted triphenylamine units

Patent 7351788 was granted and assigned to Cambridge Display Technology Limited on April, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Cambridge Display Technology Limited

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7351788

Date of Patent

April 1, 2008

Patent Application Number

10481439

Date Filed

June 20, 2002

Patent Primary Examiner

‌

Duc Truong

Patent abstract

A method for making a polymer containing a first repeat unit having formula: —Ar—N(R)—Ar(N(R′)—Ar)x— which may be substituted or unsubstituted where x or 0 or 1; each Ar is the same or different and independently is a substituted or unsubstituted aryl or heteroaryl group and R and R′ each is hydrogen or a substituent group and a second repeat unit that is the same or different from the first repeat unit and comprises a substituted or unsubstituted, aryl or heteroaryl group.