Below is what I found for the meaning of "allowed". Sounds to me like it is basically approved and only small steps left for it to be granted. Please let me know if I am missing something.
"Allowance A patent is "allowed" when the patent office examiners have determined that the patent application meets the necessary criteria of novelty, non-obviousness, feasibility, and usefulness. The applicants are notified of this certification, and that the patent office is ready to grant the patent once certain fees are paid and paperwork filed by the inventors or assignees. The term is used in the U.S. and some other countries. Few allowed patents are not subsequently granted."
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