It is possible that the easements have been abandoned or that they have been adversely possessed and are no longer valid. It is also possible you could find the current easement holders and have them convey back the easement rights.
You will need to get a real estate attorney involved to review the documents, discuss your options and assist you further.
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Mr. Koel is absolutely correct. What you would do is hire an attorney to request the court to obtain a Declaratory Judgment as to the ownership of the property (which you would claim). It is a simple suit and would probably cost you a few thousand dollars from start to finish provided there are no adverse parties. Good luck!