Drum washer with gravity assist drainage
US-12551825-B2 · Feb 17, 2026 · US
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with surface cells independently connected to pressure distributors
with surface cells independently connected to pressure distributors · 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 | B01D33/09 |
| Official title | with surface cells independently connected to pressure distributors |
| Display label | with surface cells independently connected to pressure distributors |
| Total patents | 13 |
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 | 3 |
| 2020 | 1 |
| 2021 | 1 |
| 2023 | 1 |
| 2024 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rotary drum vacuum filter with a throttling valve
US-11980837-B2 · May 14, 2024 · US
Drum washer with gravity assist drainage
US-2023302384-A1 · Sep 28, 2023 · US
Vacuum filter
US-2021252436-A1 · Aug 19, 2021 · US
Separation process having improved capacity
US-10857490-B2 · Dec 8, 2020 · US
Rotary pressure filter apparatus with reduced pressure fluctuations
US-10427073-B2 · Oct 1, 2019 · US
Flat-face valve for pulp rotary drum vacuum washer filter
US-10328368-B2 · Jun 25, 2019 · US
In-channel screening with a drum screen
US-10293284-B1 · May 21, 2019 · US
Method and apparatus for washing pulp by means of intensified suction
US-9901853-B2 · Feb 27, 2018 · US
Flat-face valve for pulp rotary drum vacuum washer filter
US-2017087493-A1 · Mar 30, 2017 · US
Flat-face valve for pulp rotary drum vacuum washer filter and method
US-9551430-B2 · Jan 24, 2017 · US
Filter device, method for its operation and use thereof
US-9486721-B2 · Nov 8, 2016 · US
Flat-face valve for pulp rotary drum vacuum washer filter and method
US-2015292639-A1 · Oct 15, 2015 · US