from both personal experience as well as chase reps on numerous occasions it is in fact 60 days!
i even have a direct quote
"Dear Steeveknowsbest,
Thank you for contacting Chase.
Since the annual fee of $95.00 was billed to your account
within 60 days of the date the account was closed, a
refund of the fee will automatically post to your account
within one to two billing cycles.
I appreciate your patience and understanding.
If you have any further questions, please reply using the
Secure Message Center.
Thank you,
A*** S***
Customer Service Specialist"
of course a csr might tell you otherwise but if you huca you should get it.