title: Utilizing algorithms in academic papers
body: <p>I'm unclear about legal status of utilizing an algorithm from a published academic paper. Is there an implicit patent over that material? How about open source applications? Would it be ok to implement that algorithm in an open source app, with one of free software licenses? </p>
  
  <p>Let's say I have access to paper A which describes algorithm B. How can I determine if I can use algorithm B in my commercial closed-source app C or open source app D? Is the answer always "no"? Is there an expiration date?</p>