Originally Posted by
Farm Quilter
Be aware that many quilt pattern designers will either not allow you to sell a quilt made with their pattern or expect you to pay them a kick back for your creation using their pattern. If you are interested in making quilts to sell, be safe and use historical patterns that are free of copywrites or design your own pattern completely.
This is just not true and there are court cases that prove it. It's a frequent topic of discussion here as a search will show.
Unless you actually signed a license agreement when you bought the pattern, the designer has no say in what you do with works made from it as long as you do not claim it as your own original design. She can neither forbid you to sell it nor charge you a pecentage.