Patent ID: 7435803

Claim:
A chimeric or humanized monoclonal antibody that binds to CD20, said antibody having a light chain variable region CDR1 comprising the sequence RASSSVSYIH (SEQ ID NO:1); CDR2 comprising the sequence ATSNLAS (SEQ ID NO:4); and CDR3 comprising the sequence QQWTSNPPT (SEQ ID NO:5); and said antibody having a heavy chain variable region CDR1 comprising the sequence SYNMH (SEQ ID NO:8); CDR2 comprising the sequence AIYPGNGDTSYNQKFKG (SEQ ID NO:9); and CDR3 comprising the sequence STYYGGDWYFDV (SEQ ID NO:10) or the sequence VVYYSNSYWYFDV (SEQ ID NO: 13).