Q: is patent # 6530731expired? if not when does it? Thank you
Google Patents shows that the patent you indicated has not expired. The expiration date shown in Google Patents may or may not be accurate. Confirming the expiration date will require some investigation. You should consult with a patent lawyer to be sure.
Also, keep in mind that there are other reasons a patent might not be enforceable. Consult with a patent lawyer to confirm the expiration date, investigate whether this patent is still enforceable, and assess whether this patent could be invalidated if challenged.
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