Fiber body production apparatus and fiber body production method
US-2026071383-A1 · Mar 12, 2026 · US
Doctor knifes
Doctor knifes · 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 | D21G3/005 |
| Official title | {Doctor knifes} |
| Display label | Doctor knifes |
| Total patents | 57 |
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 | 2 |
| 2018 | 5 |
| 2019 | 5 |
| 2020 | 7 |
| 2021 | 6 |
| 2022 | 5 |
| 2023 | 6 |
| 2024 | 12 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Stud for a doctor blade holder in a fiber web machine and doctor blade assembly for a fiber web machine
US-12442136-B2 · Oct 14, 2025 · US
Yankee drying cylinder and a tissue paper making machine
US-12421662-B2 · Sep 23, 2025 · US
Method and apparatus for anomaly detection on a doctor blade of a papermaking machine, and computing device
US-12371857-B2 · Jul 29, 2025 · US
Creped fibrous structures
US-12359376-B2 · Jul 15, 2025 · US
Bracket for a pivot rod in a doctor arrangement and doctor arrangement for a fiber web machine
US-12312744-B2 · May 27, 2025 · US
Monitoring apparatus and monitoring method
US-12180655-B2 · Dec 31, 2024 · US
Doctor device and method for determining the contact pressure of a doctor
US-12146266-B2 · Nov 19, 2024 · US
Blade and creping arrangement
US-12128647-B2 · Oct 29, 2024 · US
Blade and creping arrangement
US-2024262071-A1 · Aug 8, 2024 · US
Fibrous Structures
US-2024229357-A1 · Jul 11, 2024 · US
Set for Maintenance of a Doctor Blade in a Fiber Web Machine and Doctor Arrangement in a Fiber Web Machine
US-2024191432-A1 · Jun 13, 2024 · US
Fibrous structures
US-11970818-B2 · Apr 30, 2024 · US
Stud for a Doctor Blade Holder in a Fiber Web Machine and Doctor Blade Assembly for a Fiber Web Machine
US-2024102244-A1 · Mar 28, 2024 · US
Bracket for a pivot rod in a doctor arrangement and doctor arrangement for a fiber web machine
US-2024084510-A1 · Mar 14, 2024 · US
Fibrous structures
US-11879215-B2 · Jan 23, 2024 · US
A yankee drying cylinder and a tissue paper making machine
US-2024011222-A1 · Jan 11, 2024 · US
Die coating on air supported shell
US-11865571-B2 · Jan 9, 2024 · US
Elongated component for a manufacturing machine of a fibrous cellulosic web, its use and method for recycling
US-11814793-B2 · Nov 14, 2023 · US
Method and apparatus for anomaly detection on a doctor blade of a papermaking machine, and computing device
US-2023203753-A1 · Jun 29, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21G3/005?
- CPC D21G3/005 is the Cooperative Patent Classification code for “Doctor knifes.”
- How many patents are filed under CPC D21G3/005 (Doctor knifes)?
- Our database includes 57 publications tagged with this CPC code.
- Is patent activity under CPC D21G3/005 growing?
- Publication counts under this code: 12 in 2024 vs 5 in 2025 (latest complete years).