Medical Editor: Jay W. Marks, MD. A couple of years ago an episode of the popular TV series Grey's Anatomy featured a woman with two uteruses (or uteri). This unusual condition does, in fact, occur as a result of abnormal fetal development.
Currently, EpiPens expire 18 months from date of manufacturing. Facing criticism for the drug's rapidly rising price, Bresch said the company hopes the expiration date can be extended to a minimum of 24 months.
The Section 8 Declaration. The technical answer to the question of how long your trademark lasts is six years. After six years the USPTO can cancel your trademark if you havenât filed the appropriate paperwork. Between the fifth and sixth anniversaries of your trademark registration date, you are required to file a Section 8 Declaration.