Metallic porous membrane, classifying method using the same, and classifying device
US-2018362917-A1 · Dec 20, 2018 · US
of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires (porous ceramic material {C04B38/00} ; sintering metals C22C1/04; {making porous sintered metal bodies B22F3/10, honeycomb filters B01D46/2418, materials used for filtering exhaust gases of an internal combustion engine F01N3/022, ceramic honeycomb structures C04B38/0006})
of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires (porous ceramic material {C04B38/00} ; sintering metals C22C1/04; {making porous sintered metal bodies B22F3/10, honeycomb filters B01D46/2418, materials used for filtering exhaust gases of an internal combustion engine F01N3/022, ceramic honeycomb structures C04B38/0006}) · 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 | B01D39/20 |
| Official title | of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires (porous ceramic material {C04B38/00} ; sintering metals C22C1/04; {making porous sintered metal bodies B22F3/10, honeycomb filters B01D46/2418, materials used for filtering exhaust gases of an internal combustion engine F01N3/022, ceramic honeycomb structures C04B38/0006}) |
| Display label | of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires (porous ceramic material {C04B38/00} ; sintering metals C22C1/04; {making porous sintered metal bodies B22F3/10, honeycomb filters B01D46/2418, materials used for filtering exhaust gases of an internal combustion engine F01N3/022, ceramic honeycomb structures C04B38/0006}) |
| Total patents | 190 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 14 |
| 2017 | 19 |
| 2018 | 17 |
| 2019 | 16 |
| 2020 | 19 |
| 2021 | 23 |
| 2022 | 15 |
| 2023 | 23 |
| 2024 | 15 |
| 2025 | 9 |
| 2026 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Setter for firing, and method for manufacturing honeycomb structure using setter for firing
US-2018363981-A1 · Dec 20, 2018 · US
Exhaust gas treating device and manufacturing method of honeycomb structure
US-10155189-B2 · Dec 18, 2018 · US
Circumferential coating material and circumferentially coated honeycomb structure
US-10093808-B2 · Oct 9, 2018 · US
Ceramic honeycomb structure and its production method
US-10077693-B2 · Sep 18, 2018 · US
Device for Thickening a Cryogenic Slurry using Cross-Flow Filtration
US-2018257007-A1 · Sep 13, 2018 · US
Method for Thickening a Cryogenic Slurry using a Cross-Flow Filter Device
US-2018257008-A1 · Sep 13, 2018 · US
Sealed honeycomb structure
US-10065142-B2 · Sep 4, 2018 · US
Filtering device, and method of filtering using the filter
US-2018243672-A1 · Aug 30, 2018 · US
Portable water-purifying pouch
US-2018237315-A1 · Aug 23, 2018 · US
Ceramic honeycomb filter and its production method
US-9981881-B2 · May 29, 2018 · US
Ceramic honeycomb structure and its production method
US-9950964-B2 · Apr 24, 2018 · US
Hydrocarbon fluid-water separation
US-2018050293-A1 · Feb 22, 2018 · US
Ceramic honeycomb structure and its production method
US-2018016955-A1 · Jan 18, 2018 · US
Honeycomb structured body
US-2017354913-A1 · Dec 14, 2017 · US
Honeycomb structure
US-2017326539-A1 · Nov 16, 2017 · US
Ceramic honeycomb filter and its production method
US-2017313628-A1 · Nov 2, 2017 · US
Ceramic honeycomb structure
US-2017304762-A1 · Oct 26, 2017 · US
Ceramic honeycomb structure and its production method
US-2017298794-A1 · Oct 19, 2017 · US
Surface modified ceramic filter
US-9731982-B2 · Aug 15, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D39/20?
- CPC B01D39/20 is the Cooperative Patent Classification code for “of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires (porous ceramic material {C04B38/00} ; sintering metals C22C1/04; {making porous sintered metal bodies B22F3/10, honeycomb filters B01D46/2418, materials used for filtering exhaust gases of an internal combustion engine F01N3/022, ceramic honeycomb structures C04B38/0006}).”
- How many patents are filed under CPC B01D39/20 (of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires (porous ceramic material {C04B38/00} ; sintering metals C22C1/04; {making porous sintered metal bodies B22F3/10, honeycomb filters B01D46/2418, materials used for filtering exhaust gases of an internal combustion engine F01N3/022, ceramic honeycomb structures C04B38/0006}))?
- Our database includes 190 publications tagged with this CPC code.
- Is patent activity under CPC B01D39/20 growing?
- Publication counts under this code: 15 in 2024 vs 9 in 2025 (latest complete years).