The USPTO must receive the issue fee and final drawings within three months of when the USPTO mailed the notice to the applicant. These are statute-mandated steps and no exceptions or extensions can be granted. A Notice of Allowance And Fee(s) Due form (PTOL-85), has several parts.
Vouch definition, to support as being true, certain, reliable, etc. (usually followed by for): Her record in office vouches for her integrity. See more.
Definition of vouchsafe from the Collins English Dictionary Possessive pronouns Possessive pronouns are used when you want to indicate who owns or is associated with an item.