I just found this document from USPTO. 

Mary Fales marked this 4 segment to withdraw as patent attorney.

3) The practitioner is discharged.

(1) Withdrawal can be accomplished without material adverse effect on the interests of the client;

(4) A client insists upon taking action that the practitioner considers repugnant or with which the practitioner has a fundamental disagreement;

(6) The representation will result in an unreasonable financial burden on the practitioner or has been rendered unreasonably difficult by the client;