First Publication date: 26th July 2008 Issue Does the earlier experiment by Gulf Corp. invalidate the patents of Rosaire as the inventions were known or used? Holding Yes, as the earlier experiments constituted prior knowledge and use according to Sec 102 (a), they invalidated the patents. Rule 102 (a) Facts Rosaire and Horvitz patents relate to the methods of prospecting for oil or other hydrocarbons. The methods claimed involve the steps of taking a number of samples of…