Medinah Minerals (MDMN)

[Beth0515]

YOU CANNOT NAME ANOTHER DEAL WHERE THE TRANSFERROR RETAINED 15% of ANYTHING.

Here's a few that seem to make the cut. Took a couple minutes with Google to find:

http://www.immc.ca/index.php/properties/nivloc-mine/property-holdings

Pursuant to the Option and Joint Venture Agreement dated February 25, 2011 with Addendum thereto, dated May 22, 2012 (Option Agreement), IMMI has the sole and exclusive right and option to purchase an 85% undivided right, title and interest in and to the 18 Silver Reserve Corp. Optioned Claims (Optioned Claims) in consideration of cash payments to SRC in the total sum of US $350,000 and the issuance to SRC of 1,925,000 shares of the capital stock of IMMC. After IMMI has paid for and acquired the 85% interest in the Optioned Claims, SRC will retain a 15% undivided interest in the Optioned Claims

Here's another, though more complicated and it looks like the retained interest may actually be 25% or even 40% as the earn-in is capped at 60%:
http://www.tvipacific.com/news/News-Release-Details/2013/TVI-Pacific-Arranges-Loan-to-Joint-Venture-Partner-and-Amends-Earn-In-Terms/default.aspx

Here's "El Mozo" where Goldcorp purchased a company that has a 80% option JV with the optionor retaining 20%, convertible at optionor's discretion into a 2% NSR:
http://www.goldgroupmining.com/i/pdf/nr/2015/Goldgroup-2015-07-NR-announcing-closing-of-El-Mozo%20ac.pdf

And here you'll find the "Timmons South Gold Project" where the landowning entity retains 35% (or more) in their JV with the operating entity (DDI)
http://www.debutdiamonds.com/docs/wp-content/uploads/factsheet.pdf