Processing materials
US-10163535-B2 · Dec 25, 2018 · US
Pretreatment of the raw materials by chemical or physical means (removal of bark B27L)
Pretreatment of the raw materials by chemical or physical means (removal of bark B27L) · 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 | D21B1/02 |
| Official title | Pretreatment of the raw materials by chemical or physical means (removal of bark B27L) |
| Display label | Pretreatment of the raw materials by chemical or physical means (removal of bark B27L) |
| Total patents | 123 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 14 |
| 2016 | 26 |
| 2017 | 15 |
| 2018 | 12 |
| 2019 | 17 |
| 2020 | 13 |
| 2021 | 5 |
| 2022 | 5 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 6 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Paper products and methods and systems for manufacturing such products
US-2018320317-A1 · Nov 8, 2018 · US
Processing facility
US-10011625-B2 · Jul 3, 2018 · US
Method for preparing molded article from chinese herb residue and molded product obtained thereof
US-2018100272-A1 · Apr 12, 2018 · US
Processing materials
US-2018036706-A1 · Feb 8, 2018 · US
Enzymatic pretreatment of wood in a method for producing mechanical paper pulp
US-9834886-B2 · Dec 5, 2017 · US
Processing materials
US-9789461-B2 · Oct 17, 2017 · US
Method and structures for processing materials
US-2017275463-A1 · Sep 28, 2017 · US
Production of Cellulose Nanocrystals From Raw Wood Via Hydrothermal Treatment
US-2017260692-A1 · Sep 14, 2017 · US
Equipment protecting enclosures
US-2017263346-A1 · Sep 14, 2017 · US
Method for preparing nanofibrillar cellulose
US-2017218567-A1 · Aug 3, 2017 · US
Processes for producing cellulose pulp and pulp-derived products from lignocellulosic biomass
US-2017204563-A1 · Jul 20, 2017 · US
Processing materials
US-2017197194-A1 · Jul 13, 2017 · US
Method and structures for processing materials
US-9701838-B2 · Jul 11, 2017 · US
Equipment protecting enclosures
US-9691510-B2 · Jun 27, 2017 · US
Equipment protecting enclosures
US-2017140845-A1 · May 18, 2017 · US
Processing materials
US-9644244-B2 · May 9, 2017 · US
Processing biomass
US-2017096718-A1 · Apr 6, 2017 · US
Processes for producing cellulose pulp and pulp-derived products from lignocellulosic biomass
US-9556557-B2 · Jan 31, 2017 · US
Processing biomass
US-9556496-B2 · Jan 31, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21B1/02?
- CPC D21B1/02 is the Cooperative Patent Classification code for “Pretreatment of the raw materials by chemical or physical means (removal of bark B27L).”
- How many patents are filed under CPC D21B1/02 (Pretreatment of the raw materials by chemical or physical means (removal of bark B27L))?
- Our database includes 123 publications tagged with this CPC code.
- Is patent activity under CPC D21B1/02 growing?
- Publication counts under this code: 3 in 2024 vs 6 in 2025 (latest complete years).