Paper products and methods and systems for manufacturing such products
US-2018320317-A1 · Nov 8, 2018 · US
by dry methods
by dry methods · 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 | D21B1/06 |
| Official title | by dry methods |
| Display label | by dry methods |
| Total patents | 116 |
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 | 11 |
| 2016 | 21 |
| 2017 | 21 |
| 2018 | 14 |
| 2019 | 10 |
| 2020 | 9 |
| 2021 | 11 |
| 2022 | 2 |
| 2023 | 7 |
| 2024 | 6 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Sheet manufacturing apparatus and sheet manufacturing method
US-10105882-B2 · Oct 23, 2018 · US
Integrating the production of carboxylated cellulose nanofibrils and cellulose nanocrystals using recyclable organic acids
US-10006166-B2 · Jun 26, 2018 · US
Paper manufacturing apparatus, paper manufacturing method, and paper manufactured thereby
US-9938660-B2 · Apr 10, 2018 · US
Sheet manufacturing apparatus
US-2018043644-A1 · Feb 15, 2018 · US
Sheet manufacturing apparatus
US-9890005-B2 · Feb 13, 2018 · US
Defibration unit
US-9869057-B2 · Jan 16, 2018 · US
Defibrating unit
US-9840809-B2 · Dec 12, 2017 · US
Fibers with filler
US-2017349719-A1 · Dec 7, 2017 · US
Sheet manufacturing apparatus
US-2017314173-A1 · Nov 2, 2017 · US
Fibers with filler
US-9777129-B2 · Oct 3, 2017 · US
Sheet manufacturing apparatus, sheet manufacturing method, and sheet
US-9776365-B2 · Oct 3, 2017 · US
Sheet manufacturing apparatus
US-9776213-B2 · Oct 3, 2017 · US
Sheet manufacturing apparatus
US-9738996-B2 · Aug 22, 2017 · US
Integrating the production of carboxylated cellulose nanofibrils and cellulose nanocrystals using recyclable organic acids
US-2017226692-A1 · Aug 10, 2017 · US
Sheet manufacturing apparatus and defibrating unit
US-2017204561-A1 · Jul 20, 2017 · US
Sheet manufacturing apparatus and sheet manufacturing method
US-2017203478-A1 · Jul 20, 2017 · US
Sheet manufacturing apparatus and defibration unit
US-2017204562-A1 · Jul 20, 2017 · US
Sheet manufacturing apparatus and sheet manufacturing method
US-2017198438-A1 · Jul 13, 2017 · US
Methods for Liberating Trichome Fibers from Portions of a Host Plant
US-2017175332-A1 · Jun 22, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21B1/06?
- CPC D21B1/06 is the Cooperative Patent Classification code for “by dry methods.”
- How many patents are filed under CPC D21B1/06 (by dry methods)?
- Our database includes 116 publications tagged with this CPC code.
- Is patent activity under CPC D21B1/06 growing?
- Publication counts under this code: 6 in 2024 vs 4 in 2025 (latest complete years).