Attached files

file filename
EX-10.6 - EXHIBIT 10.6 - NORTHERN TECHNOLOGIES INTERNATIONAL CORPexh_106.htm
EX-32.2 - EXHIBIT 32.2 - NORTHERN TECHNOLOGIES INTERNATIONAL CORPexh_322.htm
EX-32.1 - EXHIBIT 32.1 - NORTHERN TECHNOLOGIES INTERNATIONAL CORPexh_321.htm
EX-31.2 - EXHIBIT 31.2 - NORTHERN TECHNOLOGIES INTERNATIONAL CORPexh_312.htm
EX-10.9 - EXHIBIT 10.9 - NORTHERN TECHNOLOGIES INTERNATIONAL CORPexh_109.htm
EX-31.1 - EXHIBIT 31.1 - NORTHERN TECHNOLOGIES INTERNATIONAL CORPexh_311.htm
10-K - FORM 10-K - NORTHERN TECHNOLOGIES INTERNATIONAL CORPgff10k_111315.htm
EX-21.1 - EXHIBIT 21.1 - NORTHERN TECHNOLOGIES INTERNATIONAL CORPexh_211.htm

Exhibit 23.1

 

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

 

We consent to the incorporation by reference in the Registration Statement on Form S-3 (File No. 333-185271) and Registration Statements on Form S-8 (File Nos. 333-140244, 333-140245 and 333-171828) of Northern Technologies International Corporation and Subsidiaries of our report dated November 13, 2015, relating to the consolidated financial statements and the effectiveness of internal control over financial reporting, which appears on page 50 of this annual report on Form 10-K for the fiscal year ended August 31, 2015.

 

/s/ Baker Tilly Virchow Krause, LLP 

Minneapolis, Minnesota 

November 13, 2015