Replacement filter cartridge
US-2019388813-A1 · Dec 26, 2019 · US
Filter identification means
Filter identification means · 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 | B01D2201/52 |
| Official title | Filter identification means |
| Display label | Filter identification means |
| Total patents | 187 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 4 |
| 2017 | 7 |
| 2018 | 17 |
| 2019 | 27 |
| 2020 | 28 |
| 2021 | 28 |
| 2022 | 25 |
| 2023 | 17 |
| 2024 | 11 |
| 2025 | 13 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Appliance water filter system having memory and authentication functionality
US-2019381431-A1 · Dec 19, 2019 · US
Filter Design With Interchangeable Core Cover
US-2019374880-A1 · Dec 12, 2019 · US
Filter element with a luminescent marker
US-10478760-B2 · Nov 19, 2019 · US
Filter with electrical signature anti-counterfeiting feature
US-2019344201-A1 · Nov 14, 2019 · US
Apparatus and Method for Weighting an Air Purifying Filter
US-2019329166-A1 · Oct 31, 2019 · US
Filter with electrical signature anti-counterfeiting feature
US-10441903-B2 · Oct 15, 2019 · US
Water purifier
US-2019299163-A1 · Oct 3, 2019 · US
Filter systems, elements and methods with short-range wireless tracking features
US-10427082-B2 · Oct 1, 2019 · US
Appliance water filter system having memory and authentication functionality
US-10406461-B2 · Sep 10, 2019 · US
Filter System and Filter Element
US-2019262751-A1 · Aug 29, 2019 · US
Filter design with interchangeable core cover
US-10391427-B2 · Aug 27, 2019 · US
Sensing System for Detecting Machine Fluid Degradation
US-2019255470-A1 · Aug 22, 2019 · US
Electromagnetic sensor for active monitoring of filter media within a filtration system
US-10363502-B2 · Jul 30, 2019 · US
Conductive loop detection member
US-10366316-B2 · Jul 30, 2019 · US
Custom filter cleaning routines for extraction systems
US-2019209957-A1 · Jul 11, 2019 · US
Sensing system for detecting machine fluid degradation
US-10315137-B2 · Jun 11, 2019 · US
Filtering element
US-10307699-B2 · Jun 4, 2019 · US
Filter system including integrated diagnostics
US-2019083909-A1 · Mar 21, 2019 · US
Disposable filter including an integrated sensor assembly
US-2019083912-A1 · Mar 21, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2201/52?
- CPC B01D2201/52 is the Cooperative Patent Classification code for “Filter identification means.”
- How many patents are filed under CPC B01D2201/52 (Filter identification means)?
- Our database includes 187 publications tagged with this CPC code.
- Is patent activity under CPC B01D2201/52 growing?
- Publication counts under this code: 11 in 2024 vs 13 in 2025 (latest complete years).