Food waste disposer
US-2023211352-A1 · Jul 6, 2023 · US
Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure · 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 | F26B21/20 |
| Official title | Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure |
| Display label | Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure |
| Total patents | 90 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 8 |
| 2018 | 8 |
| 2019 | 15 |
| 2020 | 9 |
| 2021 | 6 |
| 2022 | 8 |
| 2023 | 11 |
| 2024 | 8 |
| 2025 | 12 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Shoe care apparatus and method for controlling thereof
US-2023190074-A1 · Jun 22, 2023 · US
Shoe care apparatus and method of controlling the same
US-2022338711-A1 · Oct 27, 2022 · US
Drying apparatus and method of controlling same
US-2022192464-A1 · Jun 23, 2022 · US
Heat exchanger for heating gas and use of the heat exchanger
US-2022187034-A1 · Jun 16, 2022 · US
Low profile design air tunnel system and method for providing uniform air flow in a refractance window dryer
US-2022090857-A1 · Mar 24, 2022 · US
Heat Pump Dryer
US-2022074663-A1 · Mar 10, 2022 · US
Drying apparatus
US-2022061604-A1 · Mar 3, 2022 · US
Coating drying method and device therefor
US-11262127-B2 · Mar 1, 2022 · US
Low profile design air tunnel system and method for providing uniform air flow in a refractance window dryer
US-11221179-B2 · Jan 11, 2022 · US
Device and method for reinforcing recycled aggregate based on in-situ C-S-H production
US-11187460-B2 · Nov 30, 2021 · US
Dryer, printer, and liquid applicator
US-11090949-B2 · Aug 17, 2021 · US
Device and method for reinforcing recycled aggregate based on in-situ c-s-h production
US-2021231371-A1 · Jul 29, 2021 · US
Fluidized bed spray dryer system
US-11033914-B2 · Jun 15, 2021 · US
Burner unit and device for the temperature control of objects
US-10928134-B2 · Feb 23, 2021 · US
Food dehydrator
US-10928132-B2 · Feb 23, 2021 · US
Oven and display panel manufacturing apparatus
US-2020284511-A1 · Sep 10, 2020 · US
Sludge drying apparatus
US-2020270159-A1 · Aug 27, 2020 · US
Washstand furniture
US-10677527-B2 · Jun 9, 2020 · US
Industrial plant, paper mill, control device, apparatus and method for drying drying-stock
US-10662583-B2 · May 26, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F26B21/20?
- CPC F26B21/20 is the Cooperative Patent Classification code for “Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure.”
- How many patents are filed under CPC F26B21/20 (Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure)?
- Our database includes 90 publications tagged with this CPC code.
- Is patent activity under CPC F26B21/20 growing?
- Publication counts under this code: 8 in 2024 vs 12 in 2025 (latest complete years).