AMENDED CLAIMS

received by the International Bureau on 27 December 2013

1. (Currently amended) A method of delivering messages to

participants in an instant messaging session, said participants running an IM application, comprising: receiving by a server a message from a first participant's IM application, addressed to at least one other participant; for each other participants: determining that said other participant should be defined as active in the session, if at least one of the following conditions is true: a. increase in the percentage of active participants in the session; b. said other participant is identified as always responsive to the first participant;

c. drastic increase in conversation tempo relative to an ongoing

calculated average;

d. location change of said other participant is identified; and e. stopped driving for a predefined length of time is identified; if said participant is determined to be active - sending the message by the server to said participant; and if said participant is determined to be inactive- sending a silent notification by the server to said participant.

2. (Original) The method of claim 1 , additionally comprising, for each inactive participant - storing said message in said server storage.

3. (Original) The method of claim 2, additionally comprising providing a visual cue in said inactive participant's IM application GUI.

4. (Original) The method of claim 3, wherein said visual cue comprises a counter. 2

5. (Original) The method of claim 2, additionally comprising sending by the server said stored message to said participant when said participant becomes active.

6. (Original) The method of claim 1 , additionally comprising, for each inactive participant - sending the message by the server to said inactive participant and storing the message in the inactive participant's storage device.

7. (Original) The method of claim 6, additionally comprising increasing a displayed counter in said inactive participant's IM application GUI.

8. (Canceled)

9. (Canceled)

10. (Canceled)

11. (Canceled)

12. (Canceled)

3. (Currently amended) A system for delivering messages to

participants in an instant messaging session, comprising: a system server; a plurality of user communication devices running an IM application, said communication devices configured to communicate over a network with other users' communication devices, said system server configured to: receive a message from a first participant's IM application, addressed to at least one other participant; for each said at least one other participants: determine that the participant should be defined as active in the session , if at least one of the following conditions is true: a. increase in the percentage of active participants in the session; b. said other participant is identified as always responsive to the first participant; 3 c. drastic increase in conversation tempo relative to an ongoing

calculated average;

d. location change of said other participant is identified; and e. stopped driving for a predefined length of time is identified; if said participant is active in the session - send the message to said participant; and if said participant is inactive in the session - sending a silent notification to said participant.

14. (Original) The system of claim 13, additionally comprising, for each inactive participant - storing said message in said server.

15. (Original) The system of claim 14, additionally comprising

increasing a displayed counter in said inactive participant's IM application GUI.

16. (Original) The system of claim 14, additionally comprising sending by the server said stored message to said participant when said participant becomes active.

17. (Original) The system of claim 13, additionally comprising, for each inactive participant - sending the message by the server to said inactive participant and storing the message in the inactive participant's storage device.

18. (Original) The system of claim 17, additionally comprising

increasing a displayed counter in said inactive participant's IM application GUI.

19. (Canceled)

20. (Canceled)

21. (Canceled)

22. (Canceled)

23. (Canceled)