What is the difference between the actual filing date and the effective filing date in pre-AIA patent law?
In pre-AIA patent law, the actual filing date and the effective filing date can be different. The MPEP 2139.01 explains: “The effective filing date of a claimed invention is determined on a claim-by-claim basis and not an application-by-application basis. It is possible for different claims in a single application to have different effective filing dates.”…
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