| LEGAL DISPUTES |
Exxon's path to its metallocene patent June 1983—Exxon files first U.S. patent application covering the metallocene catalyst technology. December 1984—Exxon European patent application published. April 1985—Exxon files second U.S. application. December 1989—Exxon files third U.S. application. August 1991—Exxon files fourth U.S. application; cancels claims 1 through 11; patent office retains claim 1. April 1992—Exxon's third application is abandoned. June 1992—Exxon files amendment to fourth application, canceling claim 1 and adding claims 12 through 45. June 1994—Exxon is issued U.S. patent No. 5,324,800. |
| UPDATE | 12.99 |
| LITERATURE REF. | This data is not available for free |
| PATENT NUMBER | US pat 5.324.800 |
| PATENT ASSIGNEE | Exxon Chemical Patents |
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