As an initial matter, it is not clear what type of patent is at issue, i.e., design or patent. Design patents, unlike utility patents, have a term of 14 years from the date of issue. Furthermore, it is not stated in the question whether or not maintenance fees have been paid. Utility patents require the payment of maintenance fees to keep them in force. All of these factors affect patent term. Finally, it should be noted that "Status Date" is irrelevant for patent term purposes as it is merely a date in time for which the status description was last updated in the United Stated Patent and Trademark Office Patent Application Information Retrieval (PAIR) system. For the purposes of this discussion it will be assumed that "Status Date" was meant to be "Issue Date", i.e., the date on which the patent issued. Issue date is relevant for patent term. We will also assume that patent at issue is a utility patent and that all 3 maintenance fees have been timely paid. Accordingly, for applications filed before June 8, 1995 and for patents that were still in force on June 8, 1995, the patent term is either 17 years from the issue date or 20 years from the filing date of the earliest U.S. or international (PCT) application to which priority is claimed (excluding provisional applications), the longer term applying. Here, we have a "Filing or 371(c) date" of November 22, 1993. Using the 20 years from filing date rule, the patent term would end, November 22, 2013, which as of this writing implies that the patent has not yet expired, but will do so later this year. Using the 17 years from issuance rule, the patent term would end, March 7, 2013, which as of this writing implies that the patent has expired. Actual patent term is the longer of the two, i.e., November 22, 2013. Accordingly, with the assumptions stated, the patent is not expired as of this writing. As always, you should seek the advice of patent counsel to further clarify your particular fact scenario and so that he/she can correctly advise you to achieve your business objectives....
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