Was a first to invent rule applied to patents filed before March 16th, 2013?

No read # 1

Explanation:

the three major changes in the New Law which have heightened the importance of early filing are 1) the first party to file an application on an invention is entitled to a patent that issues on the invention, regardless of who is first to invent; 2) the important date for most prior art activities and documents becomes the filing date of an application as opposed to the date of invention as under the pre-March 16, 2013 law (Current Law); and 3) the general one-year grace period that currently allows an inventor to file a patent application within one year of a public disclosure, sale or offer for sale of an invention is eliminated. These three changes are explained in more detail below.

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