A system for leasing a group membership in a distributed processing system is provided. In accordance with this system, a remote object requests from an activation group a membership in the activation group for a period of time. Responsive to this request, the activation group determines an appropriate...http://www.google.de/patents/US6421704?utm_source=gb-gplus-sharePatent US6421704 - Method, apparatus, and product for leasing of group membership in a distributed system