IMO, this is simply formal granting of a patent for technology the company has probably been working on for some time.  If this does relate to the stalled 4th terminal, I doubt the grant will do anything to solve the engineering issues they have been working on.  As we know, its one thing to have an idea, but another to actually turn it into something.

This may be wishful thinking on my part, but a thought does come to mind.  There is the possibility an ISRO agreement is contingent on the company having full patent protection on their technology before ISRO agreeing to a contract.  After all, why would they sign a contract for technology transfer when there is no formal patent protection on the technology, and until now, no guarantee it would ever come.  With that said, I don't know if this particular patent relates to the notorious 4th terminal issue or the technology the company is proposing to transfer to ISRO, so there may be nothing to this speculation.