Vapor-liquid contacting apparatus and process with downcomer at shell
US-12515158-B2 · Jan 6, 2026 · US
Fractionating columns with surface contact and vertical guides, e.g. film action
Fractionating columns with surface contact and vertical guides, e.g. film action · 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 | B01D3/28 |
| Official title | Fractionating columns with surface contact and vertical guides, e.g. film action |
| Display label | Fractionating columns with surface contact and vertical guides, e.g. film action |
| Total patents | 52 |
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 | 6 |
| 2016 | 7 |
| 2017 | 7 |
| 2018 | 7 |
| 2019 | 8 |
| 2020 | 3 |
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 4 |
| 2024 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vapor-liquid contacting apparatus and process with cross contacting
US-11904262-B2 · Feb 20, 2024 · US
Vapor-liquid contacting apparatus and process with downcomer at shell
US-2023415083-A1 · Dec 28, 2023 · US
Vapor-liquid contacting apparatus and process with downcomer at shell
US-11786855-B2 · Oct 17, 2023 · US
Method of producing ethylene oxide and ethylene glycol
US-11618739-B2 · Apr 4, 2023 · US
Recovery of hydrocarbon diluent from froth treatment tailings
US-11566183-B2 · Jan 31, 2023 · US
Recovery of hydrocarbon diluent from froth treatment tailings
US-2022204862-A1 · Jun 30, 2022 · US
Recovery of hydrocarbon diluent from froth treatment tailings
US-11261384-B2 · Mar 1, 2022 · US
Method for recovering transition metal tetrahalide and hydrocarbons from a waste stream
US-11213765-B2 · Jan 4, 2022 · US
Oil processing
US-11149229-B2 · Oct 19, 2021 · US
Method of producing ethylene oxide and ethylene glycol
US-2021309624-A1 · Oct 7, 2021 · US
Structured packing for catalytic distillation
US-10974163-B2 · Apr 13, 2021 · US
Recovery of hydrocarbon diluent from froth treatment tailings
US-2021071087-A1 · Mar 11, 2021 · US
Vapor-liquid contacting apparatus and process with offset contacting modules
US-10933344-B2 · Mar 2, 2021 · US
Oil processing
US-2020399557-A1 · Dec 24, 2020 · US
Structured packing for catalytic distillation
US-2020147513-A1 · May 14, 2020 · US
Structured packing for catalytic distillation
US-10537826-B2 · Jan 21, 2020 · US
Method for recovering transition metal tetrahalide and hydrocarbons from a waste stream
US-2019351346-A1 · Nov 21, 2019 · US
Structured packing for catalytic distillation
US-2019314736-A1 · Oct 17, 2019 · US
Vapor-liquid contacting apparatus and process with downcomer at shell
US-2019299138-A1 · Oct 3, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D3/28?
- CPC B01D3/28 is the Cooperative Patent Classification code for “Fractionating columns with surface contact and vertical guides, e.g. film action.”
- How many patents are filed under CPC B01D3/28 (Fractionating columns with surface contact and vertical guides, e.g. film action)?
- Our database includes 52 publications tagged with this CPC code.
- Is patent activity under CPC B01D3/28 growing?
- Publication counts under this code: 4 in 2023 vs 1 in 2024 (latest complete years).