So, I've been looking at the documents, and although (or maybe because?) IANAL, something struck me as odd.
The language used here seems to indicate that Stompy bot registered "FREESPACE" as a new trademark, not a transfer of ownership of said trademark. The status assigned to that trademark is "NEW APPLICATION - RECORD INITIALIZED NOT ASSIGNED TO EXAMINER", which according to Google means that the USPTO has accepted the application and has entered it into their system, but have not yet evaluated it.
It also says: New application will be assigned to an examining attorney approximately 3 months after filing date.
To me, that strikes me as Stompy Bot having registered and possibly purchased (or having announced plans to purchase) the trademark, where the deal has to be legally concluded. Example given, an attorney examines if Interplay et al. wish to sign protest or hold the trademark where they may not initially have shown interest in doing so, thus a 3 month period to counter-bid or protest the purchase. Or alternately that is the date that the trademark may run out and Stompy Bot lets Interplay know that they are interested in purchasing the franchise, starting with the name trademark.
Atleast it seems Interplay's ownership of the Freespace trademark is listed as "DEAD" since 10/7/2011. http://www.trademarkia.com/freespace-75727695.html
Not sure what that means for ownership as a whole.
Same for Descent: Freespace The Great War since 9/3/2010. http://www.trademarkia.com/descent-freespace-the-great-war-75390434.html
Maybe the community should have made a bid before then.
No idea where one finds the actual patent for Freespace, I couldn't find its existence. All the trademark licenses listed in the wiki about Freespace and Interplay are listed as cancelled and not owner for over a year now.