Invesco Unit Trusts Taxable Income Series 640: 497J filed Dec 28, 2023

Name: Invesco Unit Trusts Taxable Income Series 640 497J (0001528621-23-001813)
Creator: Invesco Unit Trusts Taxable Income Series 640
Published: 2023-12-28

Form type: 497J
Filing date: Dec 28, 2023
Accession number: 0001528621-23-001813
Filer: Invesco Unit Trusts Taxable Income Series 640 (CIK 1686060)