Rotary internal combustion engine with pilot subchamber
US-10578012-B2 · Mar 3, 2020 · US
Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L)
Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L) · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F01C21/06 |
| Official title | Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L) |
| Display label | Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L) |
| Total patents | 124 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 12 |
| 2017 | 12 |
| 2018 | 16 |
| 2019 | 7 |
| 2020 | 20 |
| 2021 | 13 |
| 2022 | 8 |
| 2023 | 6 |
| 2024 | 10 |
| 2025 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rotary internal combustion engine with removable subchamber insert
US-10544732-B2 · Jan 28, 2020 · US
Method of manufacturing a rotary engine casing
US-10473026-B2 · Nov 12, 2019 · US
Packaged compressor
US-2019309626-A1 · Oct 10, 2019 · US
Micro-auxiliary power units
US-2019308741-A1 · Oct 10, 2019 · US
Compound engine assembly with inlet lip anti-icing
US-10428734-B2 · Oct 1, 2019 · US
Thermal energy recovery device
US-10385734-B2 · Aug 20, 2019 · US
Rotary internal combustion engine with cooled insert
US-10247092-B2 · Apr 2, 2019 · US
Rotary internal combustion engine with pilot subchamber
US-2019055882-A1 · Feb 21, 2019 · US
Rotary engine casing
US-2018347457-A1 · Dec 6, 2018 · US
Rotary internal combustion engine
US-10138804-B2 · Nov 27, 2018 · US
Rotary internal combustion engine with pilot subchamber
US-10125676-B2 · Nov 13, 2018 · US
Elastase treatment of tissue matrices
US-2018311410-A1 · Nov 1, 2018 · US
Rotary engine
US-2018283175-A1 · Oct 4, 2018 · US
Rotary engine casing with seal engaging plate having mating surface defining a fluid cavity
US-10072566-B2 · Sep 11, 2018 · US
Thermal energy recovery device
US-2018223698-A1 · Aug 9, 2018 · US
Internal combustion engine with split pilot injection
US-10041402-B2 · Aug 7, 2018 · US
Elastase treatment of tissue matrices
US-10022473-B2 · Jul 17, 2018 · US
Rotary internal combustion engine with pilot subchamber
US-2018187593-A1 · Jul 5, 2018 · US
Rotary internal combustion engine with pilot subchamber
US-10006358-B2 · Jun 26, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01C21/06?
- CPC F01C21/06 is the Cooperative Patent Classification code for “Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L).”
- How many patents are filed under CPC F01C21/06 (Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L))?
- Our database includes 124 publications tagged with this CPC code.
- Is patent activity under CPC F01C21/06 growing?
- Publication counts under this code: 10 in 2024 vs 9 in 2025 (latest complete years).