states
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The definition of patent infringement may vary by jurisdiction, but it typically includes using or selling the patented invention. In many countries, a use is required to be commercial (or to have a commercial purpose) to constitute patent infringement.[citation needed]
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Pretty unlikely in this case, but I can think of interviews where I had the same concern. MegaCorp posed a problem they were having (eg. preventing radar self jamming), I told them one solution I knew of, but I was very careful to point out that it was patented less they turn around and use it.
So I share the parent's question: Can you be held liable for infringement due to a job interview answer?
http://en.wikipedia.org/wiki/Patent_infringement
states " The definition of patent infringement may vary by jurisdiction, but it typically includes using or selling the patented invention. In many countries, a use is required to be commercial (or to have a commercial purpose) to constitute patent infringement.[citation needed] "