WILMINGTON, Del. - A creditor of bankrupt Revstone Industries LLC on June 21 filed a brief in bankruptcy court objecting to Revstone's motion seeking approval to sell the assets of its subsidiary Contech Castings LLC on grounds that the assets are not part of the bankruptcy estate and the issue is "not ripe for adjudication" (In Re: Revstone Industries LLC, No. 12-13262, Chapter 11, D. Del. Bkcy.).