Air sanitation device for refrigerator and refrigerator
US-12140365-B2 · Nov 12, 2024 · US
Allowing or improving visual supervision, e.g. lamps, transparent parts, windows
Allowing or improving visual supervision, e.g. lamps, transparent parts, windows · 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 | B01D46/4254 |
| Official title | {Allowing or improving visual supervision, e.g. lamps, transparent parts, windows} |
| Display label | Allowing or improving visual supervision, e.g. lamps, transparent parts, windows |
| Total patents | 69 |
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 | 4 |
| 2016 | 3 |
| 2017 | 8 |
| 2018 | 4 |
| 2019 | 7 |
| 2020 | 8 |
| 2021 | 10 |
| 2022 | 11 |
| 2023 | 3 |
| 2024 | 10 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Air purifier
US-2024019165-A1 · Jan 18, 2024 · US
Vacuum cleaner
US-11612291-B2 · Mar 28, 2023 · US
Vacuum cleaner
US-11612292-B2 · Mar 28, 2023 · US
Restriction indicator device for filter assembly
US-11596890-B2 · Mar 7, 2023 · US
Powered room air purifier with air-quality visual indicator
US-2022404054-A1 · Dec 22, 2022 · US
Air purifying system
US-11465085-B2 · Oct 11, 2022 · US
Powder container
US-11465089-B2 · Oct 11, 2022 · US
Air sanitation device for refrigerator and refrigerator
US-2022205701-A1 · Jun 30, 2022 · US
Refrigerator
US-2022205702-A1 · Jun 30, 2022 · US
Vacuum cleaner and filter for a vacuum cleaner
US-11363922-B2 · Jun 21, 2022 · US
Apparatus and method for filtering liquid particles from inspiratory gas flow of a patient breathing circuit affiliated with a ventilator and/or nitric oxide delivery system
US-2022160985-A1 · May 26, 2022 · US
Air purifier
US-11339985-B2 · May 24, 2022 · US
Apparatus and method for filtering liquid particles from inspiratory gas flow of a patient breathing circuit affiliated with a ventilator and/or nitric oxide delivery system
US-11278696-B2 · Mar 22, 2022 · US
Scrubber box for paint booth
US-2022072461-A1 · Mar 10, 2022 · US
System and method for launching usage mode in a multimodal surgical gas delivery system
US-2022016362-A1 · Jan 20, 2022 · US
Filter with combined wear indication and pull tab
US-2021386956-A1 · Dec 16, 2021 · US
Dirt collector for a vacuum cleaner
US-2021361135-A1 · Nov 25, 2021 · US
Vacuum cleaner
US-2021338027-A1 · Nov 4, 2021 · US
Vacuum cleaner
US-2021338026-A1 · Nov 4, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D46/4254?
- CPC B01D46/4254 is the Cooperative Patent Classification code for “Allowing or improving visual supervision, e.g. lamps, transparent parts, windows.”
- How many patents are filed under CPC B01D46/4254 (Allowing or improving visual supervision, e.g. lamps, transparent parts, windows)?
- Our database includes 69 publications tagged with this CPC code.
- Is patent activity under CPC B01D46/4254 growing?
- Publication counts under this code: 10 in 2024 vs 1 in 2025 (latest complete years).