Michael,
First you don't send a copy of your application to nobody - ever.
You can send at first a description of the benefits of your invention and not how is made or what it is.
After they sign a "Non-Disclosure/non-compete Agreement" you may show them how the invention works, do not show them your application until they sign a "Licensing Agreement"
You can write back to them and ask them if they are interested in entering in a "Exclusive or Non Exclusive Licensing Agreement" that will help you decide on the "terms and conditions".
Terms and Conditions are part of a Licensing Agreement and include royalty percentage, fees, term of agreement in years and other terms related to the licensing.
You should buy and read some books from our bookstore of course...
http://www.inventnet.com/bstore.html