File Wrapper Estoppel Trademarks

To better understand File Wrapper Estoppel Trademarks, let’s break down the individual terms: ‘file wrapper’, ‘estoppel’, ‘trademarks’.

The ‘file wrapper’ is a collection of documents housed at the US Patent & trademark Office, pertaining to patents or trademarks application and history. The file wrapper is basically all the ‘paper’ work, whether or not electronic, submitted by you to the patent office, generated by the patent office, prior art references, forms, attorney correspondence, etc.

Estoppel is a legal term that refers to doctrines that prohibit a person from broadening the scope of what they claim in patents or trademarks. If you have already made statements or assertions, expressed or implied, that suggest that there is a limitation to what your patent can do, or what trademarks may be, then by ‘estoppel’ you may not later change your mind and try to broaden your patent or your trademarks rights.

Estoppel is commonly used with patent prosecution and issues, and it also applies in other legal circumstances, such as with trademarks.