Stay in US while H4 COS is pending

Hi Saurabh, My H1B 6 year limit is completing on 3-Nov-18.My I-94 will expire on 13-Nov-18 as per my I-797.My spouse’s company is applying for my H4 COS and H4 EAD ( my spouse has approved I 140) next week. Can I stay in the US even after my I 94 expires if my H4 COS is still pending decision with USCIS at that time? What is H4 COS processing time now?