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.
Q: How Long Do Patents Last? Today, patents last 20 years from the filing date of the application. For patents that existed before June 8, 1995, the duration of the patent was 17 years from the issuance of the patent or 20 years from the filing date, whichever was longer. Design patents are limited to 14 years from the date of issuance, while plant patents last 17 years from the date of issuance.