A security interest for the perfection of which filing or the taking of possession was required under chapter 400, as it reads prior to January 1, 1989, and which attached prior to January 1, 1989, but was not perfected shall be deemed perfected on January 1, 1989, where after January 1, 1989, this chapter permits perfection without filing or authorizes filing in the office or offices where a prior ineffective filing was made.