Free Letter - District Court of Delaware - Delaware

Case 1:07-cv-00156-JJF

Document 152

Filed 07/31/2008

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Case 1:07-cv-00156-JJF

Document 152

Filed 07/31/2008

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Case 1:07-cv-00156-JJF

Document 152-2

Filed 07/31/2008

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etIN THE UNITED STATES DISTRICT COURT FOR THE DISTRICT OF DELAWARE __________________________________________ PDL BIOPHARMA, INC. ) ) Plaintiff, ) ) v. ) ) ALEXION PHARMACEUTICALS, INC., ) ) Defendant. ) __________________________________________)

C.A. No. 07-156 (JJF)

PDL'S COVENANT NOT TO SUE ALEXION FOR INFRINGEMENT OF THE UNASSERTED CLAIMS AS TO SOLIRIS The U.S. Food and Drug Administration ("FDA") has approved Soliris, as currently made, offered for sale, sold, and prescribed, only for paroxysmal nocturnal hemoglobinuria ("PNH"). PDL, on behalf of itself and any successors-in-interest to its rights under the patents-in-suit, hereby unconditionally and irrevocably covenant not to assert that any activities by Alexion regarding its currently manufactured and FDA-approved humanized antibody, Soliris, as manufactured, sold, offered for sale and prescribed only for PNH, whether occurring before or after the date of this covenant, infringe any claim of the U.S. Patent Nos. 5, 693,761, 5,693,762, and 6,180,370 except for the following claims:

U.S. Patent No. 5,693,761 5,693,762 6,180,370

Asserted Claims 1, 2, 6, 8, 17, 18, 26, 33, 35 1, 2, 3, 10, 11, 12, 13, 14, 16, 18, 19 1, 2, 5, 6, 25, 26, 27, 28

Case 1:07-cv-00156-JJF

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Filed 07/31/2008

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MORRIS, NICHOLS, ARSHT & TUNNELL LLP ________________________________ Jack B. Blumenfeld (ID # 1014) Karen Jacobs Louden (ID # 2881) 1201 North Market Street P.O. Box 1347 Wilmington, DE 19899-1347 (302) 658-9200 [email protected] Attorneys for PDL BioPharma, Inc. Matthew D. Powers Vernon M. Winters Weil, Gotshal & Manges LLP Silicon Valley Office 201 Redwood Shores Parkway Redwood Shores, CA 94065 650-802-3000 Jennifer H. Wu Rebecca E. Fett Weil, Gotshal & Manges LLP New York Office 767 Fifth Avenue New York, NY 10153 (212)310-8000 May 6, 2008

Case 1:07-cv-00156-JJF

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CERTIFICATE OF SERVICE I, the undersigned, hereby certify that on May 6, 2008, I electronically filed the foregoing with the Clerk of the Court using CM/ECF, which will send notification of such filing(s) to the following: Josy W. Ingersoll I also certify that copies were caused to be served on May 6, 2008, upon the following in the manner indicated: BY HAND Josy W. Ingersoll Andrew A. Lundgren Young, Conaway, Stargatt & Taylor, LLP The Brandywine Building 1000 West Street, 17th Flr. Wilmington, DE 19801 BY EMAIL Gerald J. Flattmann, Jr. Christine Willgoos Gregory A. Morris Kirkland & Ellis 153 East 53rd Street New York, NY 10022-4611

___________________________ Karen Jacobs Louden

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