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Lennox International Inc. (LII)

NYSE: LII · Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip · Richardson, TX · filing with the SEC since 1999
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Patents

US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 2026

213 patents granted to the 10 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 Lennox International Inc.’s names, not what it holds today.

Patents granted
213
203 utility, 10 design, 1976 to Dec 31, 2025
Granted in 2025
19
Against 17 in 2024 and 23 in 2023
Applications published
225
19 of them in 2025
Names they are printed under
10
a subsidiary, its own name
By yearGrantedApplications published
'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
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
Thermal processes and apparatus87
Engines, pumps, turbines4
Mechanical elements1
Environmental technology1
Other consumer goods1
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name10 counted
Heatcraft Refrigeration Products LLC a subsidiary
US, as the owner printed on each patent
160 granted
25 published
Heatcraft Refrigeration Products LLC a subsidiary
named as the applicant on its applications, in US
0 granted
164 published
Advanced Distributor Products LLC a subsidiary
US, as the owner printed on each patent. 1 more under the same name are not counted (printed in GD)
17 granted
8 published
Allied Air Enterprises LLC a subsidiary
US, as the owner printed on each patent
11 granted
11 published
HEATCRAFT, INC. a subsidiary
US, as the owner printed on each patent. 1 more under the same name are not counted (printed in GD)
18 granted
1 published
Lennox International Inc. its own name
US, as the owner printed on each patent
2 granted
5 published
Advanced Distributor Products LLC a subsidiary
named as the applicant on its applications, in US
0 granted
6 published
Allied Air Enterprises LLC a subsidiary
named as the applicant on its applications, in US
0 granted
5 published
Sealed Unit Parts Co., Inc. a subsidiary
US, as the owner printed on each patent
4 granted
0 published
Duro Dyne National Corp. a subsidiary
US, as the owner printed on each patent
1 granted
0 published
Newest grantseach row opens the USPTO’s own copy
GrantedPatentTitleFieldOwner as printed
Dec 9, 202512,492,852Refrigeration system with an oil drain conduit and methods of useThermal processes and apparatusHeatcraft Refrigeration Products LLC
Dec 2, 202512,487,023Refrigeration system and method of defrosting the sameThermal processes and apparatusHeatcraft Refrigeration Products LLC
Nov 25, 2025D1,102,881Bracket assemblyDuro Dyne National Corp.
Sep 30, 202512,429,233Adiabatic cooling system with pad supportThermal processes and apparatusHeatcraft Refrigeration Products LLC
Aug 5, 202512,379,127Air intake and discharge sealing structures for evaporator unitsThermal processes and apparatusHeatcraft Refrigeration Products LLC
Jul 29, 202512,372,283Hot gas defrost using medium temperature discharge gasThermal processes and apparatusHeatcraft Refrigeration Products LLC
Jul 8, 202512,352,476Cooling systemThermal processes and apparatusHeatcraft Refrigeration Products LLC
Jul 8, 202512,352,472Cooling systemThermal processes and apparatusHeatcraft Refrigeration Products LLC
Jul 1, 202512,345,456Refrigeration system with emergency cooling using dedicated compressorThermal processes and apparatusHeatcraft Refrigeration Products LLC
Jul 1, 202512,345,455Refrigeration system with emergency cooling using dedicated compressorThermal processes and apparatusHeatcraft Refrigeration Products LLC
Newest applications publishedan application is a clue, never a plan
PublishedApplicationTitleFieldOwner as printed
Dec 25, 20252025/0389468REFRIGERATION SYSTEM WITH AN OIL DRAIN CONDUIT AND METHODS OF USEThermal processes and apparatusHeatcraft Refrigeration Products LLC
Dec 18, 20252025/0383101ADIABATIC COOLING SYSTEM WITH PAD SUPPORTThermal processes and apparatusHeatcraft Refrigeration Products LLC
Oct 9, 20252025/0314406COOLING SYSTEMThermal processes and apparatusHeatcraft Refrigeration Products LLC
Sep 25, 20252025/0297789EVAPORATOR COIL INSERTThermal processes and apparatusHeatcraft Refrigeration Products LLC
Sep 25, 20252025/0297788EVAPORATOR COIL INSERTThermal processes and apparatusHeatcraft Refrigeration Products LLC
Sep 4, 20252025/0277592ADIABATIC PRE-COOLING FOR A GAS COOLERThermal processes and apparatusHeatcraft Refrigeration Products LLC
Aug 28, 20252025/0271187HOT GAS DEFROST USING MEDIUM TEMPERATURE DISCHARGE GASThermal processes and apparatusHeatcraft Refrigeration Products LLC
Aug 21, 20252025/0264255HOT GAS DEFROST USING MEDIUM TEMPERATURE DISCHARGE GASThermal processes and apparatusHeatcraft Refrigeration Products LLC
Jul 10, 20252025/0224159C02 REFRIGERATION SYSTEM WITH ISOCHORIC COMPRESSIONThermal processes and apparatusHeatcraft Refrigeration Products LLC
Jul 10, 20252025/0224158C02 REFRIGERATION SYSTEM WITH ISOCHORIC COMPRESSIONThermal processes and apparatusHeatcraft Refrigeration Products LLC
What it applied for, 2024 to 2025: Thermal processes and apparatus 39.

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.

SI Assistanton LII · research, not advice