Rambus ( RMBS) shares swooned Tuesday on word that its patent infringement suit against Infineon ( IFX) has been delayed. Rambus shares were recently off $2.66, or 11%, to $21.30. The company, which is involved in a number of messy lawsuits over patent claims, often sees volatile swings in its stock price on court-related news. Infineon was recently up 9 cents, or 0.7%, to $13.41. The retrial with Infineon had initially been scheduled for June 10, but will instead take place at a date to be determined in the fall, expected to be set sometime next month. Rambus, which licenses intellectual property used in memory chips, has been seeking to force Infineon to pay it royalties. The trial court judge decided to delay the trial, citing a number of pretrial concerns that have yet to be resolved.