Method of filtering tannery wastewater and a tannery wastewater treatment system
US-2025368541-A1 · Dec 4, 2025 · US
comprising multiple microfiltration steps
comprising multiple microfiltration steps · 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 | B01D61/1471 |
| Official title | {comprising multiple microfiltration steps} |
| Display label | comprising multiple microfiltration steps |
| Total patents | 46 |
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 | 1 |
| 2016 | 1 |
| 2017 | 2 |
| 2018 | 1 |
| 2019 | 4 |
| 2020 | 6 |
| 2021 | 8 |
| 2022 | 6 |
| 2023 | 7 |
| 2024 | 7 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Manufacturing of bupivacaine multivesicular liposomes
US-2025134814-A1 · May 1, 2025 · US
Isolation and purification method of extracellular vesicles
US-2025091006-A1 · Mar 20, 2025 · US
Manufacturing of bupivacaine multivesicular liposomes
US-12178909-B1 · Dec 31, 2024 · US
Manufacturing of bupivacaine multivesicular liposomes
US-2024408015-A1 · Dec 12, 2024 · US
Manufacturing of bupivacaine multivesicular liposomes
US-12144890-B2 · Nov 19, 2024 · US
Device and method for separating particles in a liquid, kit containing the device, and applications of the device
US-2024316506-A1 · Sep 26, 2024 · US
Isolation and purification method of extracellular vesicles
US-2024238728-A1 · Jul 18, 2024 · US
Method and system for treatment of brackish water inland desalination brine
US-2024239698-A1 · Jul 18, 2024 · US
Manufacturing of bupivacaine multivesicular liposomes
US-11925706-B2 · Mar 12, 2024 · US
Manufacturing of bupivacaine multivesicular liposomes
US-11819574-B2 · Nov 21, 2023 · US
Manufacturing of bupivacaine multivesicular liposomes
US-11819575-B2 · Nov 21, 2023 · US
Juice filtration system and methods
US-2023345974-A1 · Nov 2, 2023 · US
Process control systems and methods for use with filters and filtration processes
US-11786866-B2 · Oct 17, 2023 · US
Systems and methods for purifying solvents
US-11786841-B2 · Oct 17, 2023 · US
Manufacturing of bupivacaine multivesicular liposomes
US-2023301916-A1 · Sep 28, 2023 · US
Manufacturing of bupivacaine multivesicular liposomes
US-2023293435-A1 · Sep 21, 2023 · US
Methods of preparing viral vectors
US-2022340914-A1 · Oct 27, 2022 · US
Manufacturing of bupivacaine multivesicular liposomes
US-2022233448-A1 · Jul 28, 2022 · US
Manufacturing of bupivacaine multivesicular liposomes
US-2022233447-A1 · Jul 28, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D61/1471?
- CPC B01D61/1471 is the Cooperative Patent Classification code for “comprising multiple microfiltration steps.”
- How many patents are filed under CPC B01D61/1471 (comprising multiple microfiltration steps)?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC B01D61/1471 growing?
- Publication counts under this code: 7 in 2024 vs 3 in 2025 (latest complete years).