Abandoned patch

Hi, I've got a question - what can I do with a patch that was submitted some time ago (about a year ago) but after the review was abandoned by the author for no obvious reason? Perhaps, the author did not have time to finalize upstream and started working on something else. Can I take such a patch, clean up according to the comments and send it again? If so, how can I provide / retain the information about the original patch author? This patch still seems to be useful as it adds the support for a device that is still in production. Moreover, I will probably need this patch in my project. Will be grateful for some advice. Best regards Patryk