H1B Recapture/Revoke


My wife had her initial H1B Approved in Sept 2012. She worked on full time basis until June of 2015.

Since June 2015 she moved on from H1B to H4 due to family reasons. She has been on H4 since then. Now, she is working on H4 EAD and her employer would like to file for her H1.

Is it possible to recapture her H1B as she only used 2 and half years of her 6 year H1b validity?

P.S: She doesn’t have I140 i.e perm filing was not done till date.

Thanks in advance.