Method and device for removing reactive particles from a vacuum environment, and process plant for producing monocrystalline silicon ingots
US-2026077291-A1 · Mar 19, 2026 · US
Making use of vacuum or underpressure
Making use of vacuum or underpressure · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01D2273/28 |
| Official title | Making use of vacuum or underpressure |
| Display label | Making use of vacuum or underpressure |
| Total patents | 53 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2018 | 4 |
| 2019 | 5 |
| 2020 | 5 |
| 2021 | 14 |
| 2022 | 8 |
| 2023 | 8 |
| 2024 | 3 |
| 2025 | 4 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vacuum generation process for deposition of biomedical implant materials
US-12515169-B2 · Jan 6, 2026 · US
Air purifier including plurality of blades and air suction method thereof
US-2025222387-A1 · Jul 10, 2025 · US
Aerosol removal
US-12343669-B2 · Jul 1, 2025 · US
Filter insert for a liquid separator and liquid separator
US-2025170512-A1 · May 29, 2025 · US
Filter cleaning unit, vacuum cleaner and method for cleaning a filter in a vacuum cleaner
US-2025082154-A1 · Mar 13, 2025 · US
Filter for an autoclave
US-2024367084-A1 · Nov 7, 2024 · US
Filter and vacuum food processor
US-12076678-B2 · Sep 3, 2024 · US
Method and device for filtering contaminated air
US-11938438-B2 · Mar 26, 2024 · US
Vacuum cleaner
US-2023263349-A1 · Aug 24, 2023 · US
Vacuum cleaner
US-2023263352-A1 · Aug 24, 2023 · US
Cyclonic, dust-collecting unit and vacuum cleaner
US-2023264131-A1 · Aug 24, 2023 · US
Dust filter
US-11697085-B2 · Jul 11, 2023 · US
Valve, use of such valve, separator comprising such valve and method of cleaning a separator body
US-11648500-B2 · May 16, 2023 · US
Dust filter
US-11648499-B2 · May 16, 2023 · US
Vacuum cleaner
US-11612291-B2 · Mar 28, 2023 · US
Vacuum cleaner
US-11612292-B2 · Mar 28, 2023 · US
Filter device
US-11529581-B2 · Dec 20, 2022 · US
Aerosol removal
US-2022370940-A1 · Nov 24, 2022 · US
Filter assembly for separating liquid from compressed gas and compressor comprising such filter assembly
US-11491432-B2 · Nov 8, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2273/28?
- CPC B01D2273/28 is the Cooperative Patent Classification code for “Making use of vacuum or underpressure.”
- How many patents are filed under CPC B01D2273/28 (Making use of vacuum or underpressure)?
- Our database includes 53 publications tagged with this CPC code.
- Is patent activity under CPC B01D2273/28 growing?
- Publication counts under this code: 3 in 2024 vs 4 in 2025 (latest complete years).