Sow getting expired before RFE getting approved

My exployer filed a new H1b pettition this year. I got Rfe by june2018. USCIS has acknolwledged that they received my documents by 2-Aug-2018.

USCIS asked SOW and BRM letter as rfe docs. My worry is SOW is getting expired on Dec2018. But still my RFE is not approved.

What king of result I can expect from USCIS ? WIll that be a reason to get my pettition rejected.

Thanks in advance.

They may approve it till Dec 2018 or may give for another 6 month or more, depends on the officer.