Patent Assignment
Reel/Frame 015471/0139
Assignment of Assignor's Interest
Recorded: 2004-06-17
Pages: 2
Assignor
IMMUNOGEN, INC.
Executed: 2004-06-15
Assignee
GENENTECH, INC.
1 DNA WAY, SOUTH SAN FRANCISCO, CALIFORNIA, 94080
Covered Property
(1)
Mutant Actinosynnema Pretiosum Strain with Increased Maytansinoid Production
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.