Filter apparatus with vented core
US-12472450-B2 · Nov 18, 2025 · US
open-topped (B01D35/31 takes precedence)
open-topped (B01D35/31 takes precedence) · 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 | B01D35/34 |
| Official title | open-topped (B01D35/31 takes precedence) |
| Display label | open-topped (B01D35/31 takes precedence) |
| Total patents | 32 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 1 |
| 2017 | 7 |
| 2019 | 6 |
| 2020 | 2 |
| 2021 | 2 |
| 2022 | 4 |
| 2023 | 1 |
| 2024 | 4 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Water purifying apparatus and refrigerator including the same
US-12263425-B2 · Apr 1, 2025 · US
Filter apparatus with vented core
US-2024293764-A1 · Sep 5, 2024 · US
Filter apparatus with vented core
US-12005379-B2 · Jun 11, 2024 · US
Liquid filter arrangement; components; and, methods
US-11944925-B2 · Apr 2, 2024 · US
Water purifier
US-2024067535-A1 · Feb 29, 2024 · US
Pipe fittings with filter
US-11781693-B2 · Oct 10, 2023 · US
Liquid filter arrangement; components; and, methods
US-2022249990-A1 · Aug 11, 2022 · US
Filtration device
US-11389752-B2 · Jul 19, 2022 · US
Filter apparatus with vented core
US-2022161162-A1 · May 26, 2022 · US
Pipe fittings with filter
US-2022082194-A1 · Mar 17, 2022 · US
Liquid filter arrangement; components; and, methods
US-11207621-B2 · Dec 28, 2021 · US
Water purifying apparatus and refrigerator including the same
US-2021291090-A1 · Sep 23, 2021 · US
Filtration device
US-2020353383-A1 · Nov 12, 2020 · US
Liquid filter arrangement; components; and, methods
US-2020086252-A1 · Mar 19, 2020 · US
Manifold arrangement
US-2019374888-A1 · Dec 12, 2019 · US
Liquid filter arrangement; components; and, methods
US-10493386-B2 · Dec 3, 2019 · US
Manifold arrangement
US-10391432-B2 · Aug 27, 2019 · US
Filter device
US-10343099-B2 · Jul 9, 2019 · US
Passive devices and methods for separating initial rain water runoff and subsequent rain water runoff
US-2019151781-A1 · May 23, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D35/34?
- CPC B01D35/34 is the Cooperative Patent Classification code for “open-topped (B01D35/31 takes precedence).”
- How many patents are filed under CPC B01D35/34 (open-topped (B01D35/31 takes precedence))?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC B01D35/34 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).