ALERT: This system is being upgraded on Tuesday December 12. It will not be available for use for several hours that day while the upgrade is in progress. Deposits to DukeSpace will be disabled on Monday December 11, so no new items are to be added to the repository while the upgrade is in progress. Everything should be back to normal by the end of day, December 12.
 

In 1989, American chemical company, E.I. du Pont de Nemours & Co., filed suit against Cetus Corporation, alleging the Cetus core PCR patents were not novel. Despite strong witnesses, DuPont could not prove that PCR invention had been obvious, and court ruled in favor of Cetus.

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