Last reviewed on RxList 9/14/2016. Estrace (estradiol) vaginal cream is a preparation of estrogen, a female hormone, for topical application to the vaginal area used to treat certain symptoms of menopause such as dryness, burning, and itching of the vaginal area and urgency or irritation with urination.
A provisional application for patent lasts 12 months from its filing date. The USPTO will not grant extensions for any reason. The inventor(s) must file a Non-Provisional Patent Application within that period to take advantage of the Provisional Application for Patent's filing date.
Patents with 1380+ answers. Most utility patents expire 20 years after the earliest filing date, assuming the owner pays maintenance fees. Design patent expire in 14 years after they are issued. Depending on how slow is the US patent office, some US patents may get term extensions; however, no matter what, all patents do eventually expire. For more details, read: 2701-.