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Biotech / Medical : Ligand (LGND) Breakout!

LGND 196.08

-0.2%

Jan 15 3:59 PM EST

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To: Henry Niman who wrote (4799)	8/15/1997 5:08:00 AM
From: Cheryl Galt	of 32384

I'm suprised no one posted THIS one yet. August 13, 1997 LIGAND PHARMACEUTICALS INC (LGND) Quarterly Report (SEC form 10-Q) sec.yahoo.com Henry, would you comment on this little nugget (located a little more than half-way down the file): Ligand has learned that a United States patent has been issued to, and foreign counterparts have been filed by, Hoffman LaRoche ("Roche") that include claims to a formulation of 9-cis-Retinoic acid (Panretin (ALRT1057)) and use of that compound to treat epithelial cancers. Ligand had previously filed an application which has an earlier filing date than the Roche patent and which has claims that the Company believes are broader than but overlap in part with claims under the Roche patent. Ligand's rights under its patent application have been exclusively licensed to ALRT. Ligand and ALRT are currently investigating the scope and validity of this patent to determine its impact upon the Oral and Topical Panretin (ALRT1057) products. The PTO has informed Ligand that the overlapping claims are patentable to Ligand and stated its intention to initiate an interference proceeding to determine whether Ligand or Roche is entitled to a patent by having been first to invent the common subject matter. The Company cannot be assured of a favorable outcome in the interference proceeding because of factors not known at this time upon which the outcome may depend. In addition, the interference proceeding may delay the decision of the PTO regarding the Company's application with claims covering the Oral and Topical Panretin (ALRT1057) products. While the Company believes that the Roche patent does not cover the use of Oral and Topical Panretin (ALRT1057) to treat leukemias such as APL and sarcomas such as KS, or the treatment of skin diseases such as psoriasis, if the Company and ALRT do not prevail in the interference proceeding, the Roche patent might block the Company's use of Oral and Topical Panretin (ALRT1057) in certain cancers, and the Company may not be able to obtain patent protection for the Oral and Topical Panretin (ALRT1057) products.

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