What is the significance of the application filing date in patent law?

What is the significance of the application filing date in patent law?

The application filing date is crucial in patent law for several reasons:

  • Priority: It establishes the priority date for the claimed invention, which is used to determine novelty and non-obviousness.
  • Disclosure requirement: The specification must fully support the claimed invention as of the filing date.
  • New matter prohibition: Any material added after the filing date may be considered new matter and rejected.

As stated in MPEP 608.04(a): Matter not present on the filing date of the application in the specification, claims, or drawings that is added after the application filing date is usually new matter. This underscores the importance of having a complete and comprehensive disclosure at the time of filing.

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Topics: Patent Law, Patent Procedure
Tags: new matter