WILMINGTON, Del. - The Pension Benefit Guaranty Corp. (PBGC) on Jan. 9 filed a joinder to the motion filed by the Official Committee of Unsecured Creditors in the Chapter 11 bankruptcy case of Revstone Industries LLC, seeking an order compelling Revstone's chairman to produce documents and appear for a deposition regarding claims that he is using personal trusts to shield company assets from creditors (In Re: Revstone Industries LLC, No. 12-13262, Chapter 11, D. Del. Bkcy.).