Are the oak chips packages sealed, and are they Toasted or just chips? If the chips are in a sealed container, they should be perfectly fine. The oak flavor and tanic acid should still be good. If the Oak package is not sealed burn them. I have been a custom furniture maker for 35 years, so I know wood. As long as White Oak is not allowed to take on moisture, thus the question on" are the packages sealed", the oak should be just fine.
I have been experimenting with Oak beans that are toasted verses Toasted Oak barrels> very interesting results.