Paper filler composition
US-2024240400-A1 · Jul 18, 2024 · US
by mechanical or physical means
by mechanical or physical means · 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 | D21C9/007 |
| Official title | {by mechanical or physical means} |
| Display label | by mechanical or physical means |
| Total patents | 419 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 31 |
| 2016 | 41 |
| 2017 | 34 |
| 2018 | 40 |
| 2019 | 47 |
| 2020 | 51 |
| 2021 | 42 |
| 2022 | 43 |
| 2023 | 30 |
| 2024 | 31 |
| 2025 | 24 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Functionalizing cellulosic and lignocellulosic materials
US-2016333528-A1 · Nov 17, 2016 · US
Array for processing materials
US-9464334-B2 · Oct 11, 2016 · US
Method for making modified cellulose products
US-2016289894-A1 · Oct 6, 2016 · US
Nanocellulose
US-2016289893-A1 · Oct 6, 2016 · US
Process for treating microfibrillated cellulose and microfibrillated cellulose treated according to the process
US-9447540-B2 · Sep 20, 2016 · US
Process for treating cellulose and cellulose treated according to the process
US-9447541-B2 · Sep 20, 2016 · US
Process for dewatering microfibrillated cellulose
US-2016265160-A1 · Sep 15, 2016 · US
Method and a system for manufacturing cellulosic material
US-9441052-B2 · Sep 13, 2016 · US
Functionalizing cellulosic and lignocellulosic materials
US-9422667-B2 · Aug 23, 2016 · US
Dry fluff pulp sheet additive
US-2016237624-A1 · Aug 18, 2016 · US
Nanocellulose production using lignosulfonic acid
US-2016237173-A1 · Aug 18, 2016 · US
Method for producing alkali cellulose
US-9416198-B2 · Aug 16, 2016 · US
Nanocellulose and Nanocellulose Composites as Substrates for Conformal Bioelectronics
US-2016198984-A1 · Jul 14, 2016 · US
Reconfigureable processing enclosures
US-9388442-B2 · Jul 12, 2016 · US
Method for pretreating cellulose pulp
US-2016186376-A1 · Jun 30, 2016 · US
Nanocellulose-polymer composites, and processes for producing them
US-2016168363-A1 · Jun 16, 2016 · US
Paper products and methods and systems for manufacturing such products
US-9365981-B2 · Jun 14, 2016 · US
Process for producing a dispersion comprising nanoparticles and a dispersion produced according to the process
US-9365978-B2 · Jun 14, 2016 · US
Method for catalytic oxidation of cellulose and method for making a cellulose product
US-2016160440-A1 · Jun 9, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C9/007?
- CPC D21C9/007 is the Cooperative Patent Classification code for “by mechanical or physical means.”
- How many patents are filed under CPC D21C9/007 (by mechanical or physical means)?
- Our database includes 419 publications tagged with this CPC code.
- Is patent activity under CPC D21C9/007 growing?
- Publication counts under this code: 31 in 2024 vs 24 in 2025 (latest complete years).