Onyx Pharmaceuticals (ONXX) reported third quarter earnings of 28 cents per share, well above the Zacks Consensus Estimate of 22 cents as well as 21 cents reported in the year-ago period. The company, along with Bayer AG (BAYRY.PK), developed Nexavar (sorafenib) tablets, an anticancer therapy currently approved and marketed for the treatment of liver cancer and advanced kidney cancer in the US, European Union, Japan and some other countries. Onyx’s earnings come in the form of royalty and collaboration income on Nexavar sales.  For the quarter, Onyx reported revenues of $69.1 million compared to $50.8 million for the same period in 2008 primarily due to an increase in Nexavar sales and royalty revenue and a decline in the drug’s commercial expenses. While revenues increased 36%, a 43.6% rise in operating expenses brought down Onyx’s operating margin by 450 basis points to 14.5%. R&D and SG&A expenses increased ...