The copyright extends 50 years after the maker of the pattern dies, so chances are your pattern is still covered. Whether you profit from it has no bearing on the copyright. You need the permission of the person who holds the copyright to make copies. (That's kind of what the word "copyright" implies.)
However... you can legally sell or give the original pattern to someone else (without keeping any copies, of course).
This is the best explanation I have found concerning copyright:
http://www.quilt.com/FAQS/CopyrightFAQ.html