Invesco Unit Trusts Taxable Income Series 640: 497J filed Sep 26, 2022

Name: Invesco Unit Trusts Taxable Income Series 640 497J (0001528621-22-001453)
Creator: Invesco Unit Trusts Taxable Income Series 640
Published: 2022-09-26

Form type: 497J
Filing date: Sep 26, 2022
Accession number: 0001528621-22-001453
Filer: Invesco Unit Trusts Taxable Income Series 640 (CIK 1686060)