High yield chemical pulping and bleaching process
US-12435469-B2 · Oct 7, 2025 · US
with ozone
with ozone · 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 | D21C9/153 |
| Official title | with ozone |
| Display label | with ozone |
| Total patents | 51 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 11 |
| 2021 | 5 |
| 2022 | 4 |
| 2023 | 8 |
| 2024 | 5 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System for decolorization of material comprising cellulose
US-2025283276-A1 · Sep 11, 2025 · US
Method for producing recycled pulp fibers, and recycled pulp fibers
US-12364629-B2 · Jul 22, 2025 · US
Method for distrubting chemicals in delignifiction stages of pulp bleaching process
US-2025122668-A1 · Apr 17, 2025 · US
Arrangement and method for degassing a pump
US-2025101681-A1 · Mar 27, 2025 · US
Arrangement and method for degassing a pump
US-12173451-B2 · Dec 24, 2024 · US
Plate-type ozone generator and system for generating ozone
US-2024414832-A1 · Dec 12, 2024 · US
Method for producing pulp fibers for cellulose nanofiberization, and pulp fibers for cellulose nanofiberization
US-11987932-B2 · May 21, 2024 · US
Method for producing recycled pulp fibers, and recycled pulp fibers
US-2024050290-A1 · Feb 15, 2024 · US
Method for producing softwood-derived pulp fibers for paper and softwood-derived pulp fibers for paper
US-11879210-B2 · Jan 23, 2024 · US
Method for bleaching pulp from recycled textile material
US-2023392320-A1 · Dec 7, 2023 · US
Short-sequence ecf bleaching process x/z/d-eop-d or x/d/z-eop-d for kraft wood pulp
US-2023349098-A1 · Nov 2, 2023 · US
Method for producing pulp fibres for saccharification, and aqueous solution of pulp fibres for saccharification
US-11773536-B2 · Oct 3, 2023 · US
Method for producing recycled pulp fibers by decomposing super absorbant polymers with ozone
US-11771604-B2 · Oct 3, 2023 · US
High yield chemical pulping and bleaching process
US-2023265609-A1 · Aug 24, 2023 · US
Method for producing pulp fibers for cellulose nanofiberization, and pulp fibers for cellulose nanofiberization
US-2023160142-A1 · May 25, 2023 · US
Method for preparing dissolving pulp by TCF bleaching of poplar KP
US-11643777-B2 · May 9, 2023 · US
Recycled pulp, absorbent, non-woven fabric, and sanitary article
US-11554520-B2 · Jan 17, 2023 · US
Method for manufacturing recycled pulp from used sanitary products
US-11319670-B2 · May 3, 2022 · US
Method for producing pulp fibers to be saccharified
US-11299851-B2 · Apr 12, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C9/153?
- CPC D21C9/153 is the Cooperative Patent Classification code for “with ozone.”
- How many patents are filed under CPC D21C9/153 (with ozone)?
- Our database includes 51 publications tagged with this CPC code.
- Is patent activity under CPC D21C9/153 growing?
- Publication counts under this code: 5 in 2024 vs 5 in 2025 (latest complete years).