Patents
US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 2026
25 patents granted to the 2 names below, as the owner printed on each patent when it was granted. A later sale, a lapse or an expiry is not read, so this is what was granted to Northern Technologies International Corporation’s names, not what it holds today.
Patents granted
25
25 utility, 1976 to Dec 31, 2025
Granted in 2025
none
Against 3 in 2024 and none in 2023
Applications published
29
1 of them in 2025
Names they are printed under
2
its own name
By yearGrantedApplications published
'07'10'11'12'13'14'15'16'17'20'21'22'23'24'25
Each pair is one calendar year. Applications are published about eighteen months after filing, so the newest years read low.
What they are aboutgrants since 2021
Macromolecular chemistry, polymers4
Other special machines1
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name2 counted
Northern Technologies International Corporation its own name
US, as the owner printed on each patent
15 publishedNORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION its own name
named as the applicant on its applications, in US
14 published
Newest grantseach row opens the USPTO’s own copy
| Granted | Patent | Title | Field | Owner as printed |
|---|
| May 21, 2024 | 11,987,696 | Biobased polyester blends with enhanced performance properties | Macromolecular chemistry, polymers | Northern Technologies International Corporation |
| Mar 26, 2024 | 11,939,423 | Biodegradable VCI packaging compositions | Macromolecular chemistry, polymers | Northern Technologies International Corporation |
| Feb 20, 2024 | 11,905,407 | Polylactide-based masterbatch, for a commercially viable single-step in-mold annealing injection molding process | Other special machines | Northern Technologies International Corporation |
| Nov 1, 2022 | 11,485,852 | High impact resistant poly(lactic acid) blends | Macromolecular chemistry, polymers | Northern Technologies International Corporation |
| Dec 14, 2021 | 11,198,798 | Self-fusing silicone tape compositions having corrosion inhibitors therein | Macromolecular chemistry, polymers | Northern Technologies International Corporation |
| May 23, 2017 | 9,656,201 | Smart, on-demand controlled release corrosion protection and/or prevention of metals in an enclosure | Surface technology, coating | Northern Technologies International Corporation |
| Jan 31, 2017 | 9,556,635 | Storage tank bottom corrosion protection system | Surface technology, coating | Northern Technologies International Corporation |
| Apr 5, 2016 | 9,303,380 | Systems for corrosion protection of storage tank soil side bottoms | Surface technology, coating | Northern Technologies International Corporation |
| Oct 27, 2015 | 9,169,720 | Corrosion management systems for vertically oriented structures | Civil engineering | Northern Technologies International Corporation |
| May 13, 2014 | 8,720,390 | Fuel performance booster | Engines, pumps, turbines | Northern Technologies International Corporation |
Newest applications publishedan application is a clue, never a plan
| Published | Application | Title | Field | Owner as printed |
|---|
| Apr 10, 2025 | 2025/0114994 | HIGH STRENGTH AND TOUGHNESS BIAXIALLY-ORIENTED POLYLACTIC ACID (BOPLA) FILM AND PREPARATION METHOD THEREOF | Other special machines | NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION |
| Jul 11, 2024 | 2024/0230569 | SYSTEMS AND METHODS OF MEASURING A CONCENTRATION OF VOLATILE CORROSION INHIBITORS | Measurement | NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION |
| Apr 25, 2024 | 2024/0133833 | SYSTEMS AND METHODS OF MEASURING A CONCENTRATION OF VOLATILE CORROSION INHIBITORS | Measurement | NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION |
| Nov 16, 2023 | 2023/0366102 | POLYACRYLAMIDES AS VOLATILE CORROSION INHIBITORS AND DESICCANTS, METHODS OF USING, AND METHODS OF MAKING THE SAME | Surface technology, coating | NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION |
| Aug 24, 2023 | 2023/0266231 | COLORED REAGENT COMPLEX AND METHOD OF DETECTING A RUST REMOVING AGENT IN METAL WORKING FLUIDS USING THE SAME | Measurement | NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION |
| Mar 2, 2023 | 2023/0060503 | COLORIMETRIC QUANTIFICATION OF CORROSION INHIBITOR COMPOUNDS IN INDUSTRIAL FLUIDS | Measurement | NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION |
| Jun 30, 2022 | 2022/0204755 | POLYLACTIDE-BASED MASTERBATCH, FOR A COMMERCIALLY VIABLE SINGLE-STEP IN-MOLD ANNEALING INJECTION MOLDING PROCESS | Other special machines | NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION · patent 11,905,407 granted from it |
| Jun 16, 2022 | 2022/0185953 | BIODEGRADABLE VCI PACKAGING COMPOSITIONS | Macromolecular chemistry, polymers | NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION · patent 11,939,423 granted from it |
| Sep 9, 2021 | 2021/0277228 | BIOBASED POLYESTER BLENDS WITH ENHANCED PERFORMANCE PROPERTIES | Macromolecular chemistry, polymers | NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION · patent 11,987,696 granted from it |
| Aug 19, 2021 | 2021/0253849 | HIGH IMPACT RESISTANT POLY(LACTIC ACID) BLENDS | Macromolecular chemistry, polymers | NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION · patent 11,485,852 granted from it |
What it applied for, 2024 to 2025: Measurement 2 · Other special machines 1.
A patent is counted where the owner printed on it when it was granted carries the company’s own name, a former name, the name of a subsidiary its annual report lists, or its own name with a patent-holding phrase (Technology Licensing, Intellectual Property and the like), once the legal form, case and punctuation are set aside, and prints a country that name counts in. PatentsView’s data are published under the Creative Commons Attribution 4.0 licence. Source: PatentsView's granted patents and pre-grant publications, disambiguated, from the USPTO's Open Data Portal, through Dec 31, 2025, read Oct 27, 2026.