We need to look at the attachments, which the link does not provide. But this part of the agreement is interesting. Note the underlined.

4.6 Intellectual Property.

(a) TPL has a valid and subsisting license to the MSD Patents from Moore. Except as disclosed on Schedule 4.6(a), TPL has not received any notice or claim challenging TPL's rights with respect to the MSD Patents or suggesting that any Person, other than Patriot and Moore, has any claim of legal or beneficial ownership with respect thereto, nor, to TPL's knowledge, is there a reasonable basis for any such claim.

The smoking gun? Opty