Invesco Unit Trusts Taxable Income Series 437: 497J filed Jun 30, 2021

Name: Invesco Unit Trusts Taxable Income Series 437 497J (0001528621-21-001019)
Creator: Invesco Unit Trusts Taxable Income Series 437
Published: 2021-06-30

Form type: 497J
Filing date: Jun 30, 2021
Accession number: 0001528621-21-001019
Filer: Invesco Unit Trusts Taxable Income Series 437 (CIK 1547615)