On January 4, 2022, Northern Technologies International Corporation (NTIC) and PNC Bank, National Association entered into an Amended and Restated Revolving Line of Credit Note, which extended the maturity date of NTIC's revolving line of credit facility to January 7, 2023 and revised the rate at which amounts outstanding under the line of credit bear interest to equal a per annum rate equal to the daily Bloomberg Short-Term Bank Yield Index plus 250 basis points (2.50%). Additionally, beginning February 23, 2022 and through January 7, 2023, the line of credit will be decreased from $5,000,000 to $3,000,000. The other material terms of the line of credit were not affected by this amendment.