Advanced fuel filtration system with interlocking cartridge seal design
US-12576348-B2 · Mar 17, 2026 · US
including arrangements for environmental protection, e.g. pressure resisting features
including arrangements for environmental protection, e.g. pressure resisting features · 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 | B01D35/31 |
| Official title | including arrangements for environmental protection, e.g. pressure resisting features |
| Display label | including arrangements for environmental protection, e.g. pressure resisting features |
| Total patents | 46 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 3 |
| 2017 | 4 |
| 2018 | 6 |
| 2019 | 4 |
| 2020 | 5 |
| 2021 | 1 |
| 2022 | 4 |
| 2023 | 2 |
| 2024 | 9 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Filter assembly for an aircraft engine
US-2025352932-A1 · Nov 20, 2025 · US
Filter for fluidic applications
US-2024382891-A1 · Nov 21, 2024 · US
Filter with electrostatic discharge mitigation sleeve
US-2024252961-A1 · Aug 1, 2024 · US
High pressure filter apparatus with external sleeve and related methods
US-2024226785-A9 · Jul 11, 2024 · US
Sealing systems and methods for a filtration system
US-2024173654-A1 · May 30, 2024 · US
Hydraulic control line filters for subsea high-pressure application
US-11988061-B2 · May 21, 2024 · US
Fracture shield filter tool, method and system
US-2024139660-A1 · May 2, 2024 · US
High pressure filter apparatus with external sleeve and related methods
US-2024131458-A1 · Apr 25, 2024 · US
Sealing systems and methods for a filtration system
US-11931676-B2 · Mar 19, 2024 · US
Filter with electrostatic discharge mitigation sleeve
US-11890560-B2 · Feb 6, 2024 · US
Hydraulic control line filters for subsea high-pressure application
US-2023265730-A1 · Aug 24, 2023 · US
Multilayer fiber composite filter media
US-2023191293-A1 · Jun 22, 2023 · US
Sloped sunshade cover
US-11440812-B2 · Sep 13, 2022 · US
Water purifying filter
US-11400395-B2 · Aug 2, 2022 · US
Liquid filter
US-2022168671-A1 · Jun 2, 2022 · US
Sealing systems and methods for a filtration system
US-2022047971-A1 · Feb 17, 2022 · US
Fuel pre-filtering element
US-11007459-B2 · May 18, 2021 · US
Filter with electrostatic discharge mitigation sleeve
US-2020346146-A1 · Nov 5, 2020 · US
Sloped Sunshade Cover
US-2020339436-A1 · Oct 29, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D35/31?
- CPC B01D35/31 is the Cooperative Patent Classification code for “including arrangements for environmental protection, e.g. pressure resisting features.”
- How many patents are filed under CPC B01D35/31 (including arrangements for environmental protection, e.g. pressure resisting features)?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC B01D35/31 growing?
- Publication counts under this code: 9 in 2024 vs 1 in 2025 (latest complete years).