Eastman Kodak Co. won court permission yesterday to retain exclusive control of its bankruptcy case through Feb. 28 as it tries to execute a $793 million financing offer from a group of bondholders, Reuters reported yesterday. Bankruptcy Judge Alan Gropper approved the extension, allowing Kodak to move forward with its plan without creditors pushing competing proposals. The extension was supported by most creditors. It was opposed by a group of bondholders, some of whom had made an unsuccessful effort to finance Kodak's emergence from chapter 11.