Paper and pulp foam control agent
US-12590414-B2 · Mar 31, 2026 · US
Prevention of foam
Prevention of foam · Cooperative Patent Classification (CPC)
Textile and paper production, treatment, and products.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | D21C3/28 |
| Official title | Prevention of foam |
| Display label | Prevention of foam |
| Total patents | 29 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 5 |
| 2017 | 4 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 2 |
| 2022 | 4 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for increasing digestion efficiency of lignocellulosic material in a treatment vessel
US-2025333905-A1 · Oct 30, 2025 · US
Process for increasing digestion efficiency of lignocellulosic material in a treatment vessel
US-12351981-B2 · Jul 8, 2025 · US
Defoaming formulations containing organopolysiloxanes
US-12064711-B2 · Aug 20, 2024 · US
Defoaming formulations containing organopolysiloxanes
US-11931673-B2 · Mar 19, 2024 · US
Defoaming formulations containing organopolysiloxanes
US-11925883-B2 · Mar 12, 2024 · US
Paper and pulp foam control agent
US-2023383469-A1 · Nov 30, 2023 · US
Process for increasing digestion efficiency of lignocellulosic material in a treatment vessel
US-2023160140-A1 · May 25, 2023 · US
Waste recycle composition
US-11492755-B2 · Nov 8, 2022 · US
Defoaming formulations containing organopolysiloxanes
US-2022001303-A1 · Jan 6, 2022 · US
Defoaming formulations containing organopolysiloxanes
US-2022001301-A1 · Jan 6, 2022 · US
Defoaming formulations containing organopolysiloxanes
US-2022001302-A1 · Jan 6, 2022 · US
Defoaming formulations containing organopolysiloxanes
US-10870071-B2 · Dec 22, 2020 · US
Waste recycle composition
US-2020063347-A1 · Feb 27, 2020 · US
Defoaming formulations containing organopolysiloxanes
US-2019224591-A1 · Jul 25, 2019 · US
Foam control formulations
US-10293279-B2 · May 21, 2019 · US
Defoaming compositions comprising amphiphilic particles and methods of making and using the same
US-9999846-B2 · Jun 19, 2018 · US
Antifoaming agents for the paper industry, based on oil in water emulsions
US-9982392-B2 · May 29, 2018 · US
Defoaming agent
US-2017312657-A1 · Nov 2, 2017 · US
Defoaming compositions comprising hydroxy terminated siloxanes and methods of making and using the same
US-9669332-B2 · Jun 6, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C3/28?
- CPC D21C3/28 is the Cooperative Patent Classification code for “Prevention of foam.”
- How many patents are filed under CPC D21C3/28 (Prevention of foam)?
- Our database includes 29 publications tagged with this CPC code.
- Is patent activity under CPC D21C3/28 growing?
- Publication counts under this code: 3 in 2024 vs 2 in 2025 (latest complete years).