What is a transitional application in patent law?

A transitional application in patent law refers to a patent application that was filed during a specific transition period when patent laws or rules were changing. In the context of MPEP 803.03(b), it specifically relates to applications where fees were paid for additional species claims.

The MPEP states: Whenever claims drawn to an additional species in a transitional application for which applicant paid the fee set forth in 37 CFR 1.17(s) are no longer withdrawn from consideration because they are fully embraced by an allowable generic claim, applicant should be notified that he or she may request a refund of the fee paid for that additional species. This indicates that transitional applications may involve fees for additional species claims that could potentially be refunded under certain circumstances.

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Tags: fee refund, Generic Claims, patent law, species claims, transitional application