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.
Tips & Warnings. 1  To get the earliest possible date for your invention, you may also file a Provisional Patent Application (PPA) for $75.  If you do file a PPA, you must file a regular patent application on the same invention within one year in order to preserve the PPA's filing date.