Can I include Abandoned Patent in CV? I recently came to know that one of the patent we filed in my previous organization has been abandoned. I am currently preparing my resume for PhD applications. I am confused whether to specify the abandoned patent in resume/CV considering the effort involved in coming up with the patent.

I thought of specifying like this in resume

"Patent Name", "Inventors:....", "Application No....","Status-Abandoned"
I'm assuming you mean abandoned in the sense defined by the USPTO. A patent (application) is abandoned if the application is never completed for some reason and cannot move forward to registration. In that sense an abandoned patent is not a patent, so it would seem to be a mistake to include it as anything other than incomplete and abandoned work. 

Perhaps you can find a way to include the work in another way that is more positive. Did it result in any publications, for example?