Methods, systems, and computer program products for enabling message senders and event creators to convey time-sensitivity of their messages and events (such as electronic mail messages, electronic calendar entries, and "to-do" items), and for handling such messages and events at a receiver. A message...http://www.google.com/patents/US20030018724?utm_source=gb-gplus-sharePatent US20030018724 - Time-sensitive messages and events
