Advanced visco-seals for single screw extruders
US-2026042250-A1 · Feb 12, 2026 · US
with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance
with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B29C48/52 |
| Official title | with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance |
| Display label | with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance |
| Total patents | 32 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 5 |
| 2018 | 4 |
| 2019 | 3 |
| 2020 | 2 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 4 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
High shear mixing unit
US-2025269338-A1 · Aug 28, 2025 · US
Extruder having screw elements with a particularly large pitch in the region of the gas venting opening, and use of said extruder
US-12358202-B2 · Jul 15, 2025 · US
Screw elements with improved mixing effect and pressure build-up
US-2025196077-A1 · Jun 19, 2025 · US
Plasticizing unit
US-12304125-B2 · May 20, 2025 · US
Plastic optical fiber manufacturing method and plastic optical fiber manufacturing apparatus
US-2024375336-A1 · Nov 14, 2024 · US
Dispensing device and methods thereof
US-2024173908-A1 · May 30, 2024 · US
Method and extruder for preparing a high quality block of immobilized active media
US-2024017462-A1 · Jan 18, 2024 · US
Plasticizing unit
US-2023302699-A1 · Sep 28, 2023 · US
Method of producing powder coating material
US-11708496-B2 · Jul 25, 2023 · US
Extruder having screw elements with a particularly large pitch in the region of the gas venting opening, and use of said extruder
US-2022339841-A1 · Oct 27, 2022 · US
Asymmetric co-rotating multi-screw extrusion device, extruder and processing method thereof
US-11292175-B2 · Apr 5, 2022 · US
Screw-type extruder
US-2021187814-A1 · Jun 24, 2021 · US
Asymmetric co-rotating multi-screw extrusion device, extruder and processing method thereof
US-2021023759-A1 · Jan 28, 2021 · US
Method of producing powder coating material
US-2020325346-A1 · Oct 15, 2020 · US
Twin-screw extruder including variable diameter of screws and barrel and kneading method using the twin-screw extruder including variable diameter of screws and barrel
US-10532492-B2 · Jan 14, 2020 · US
Single and twin screw extruders with ultrasound horns for decrosslinking and devulcanization
US-10465059-B2 · Nov 5, 2019 · US
Continuous kneading device
US-10449498-B2 · Oct 22, 2019 · US
Device for extruding elastomer mixtures
US-10343322-B2 · Jul 9, 2019 · US
Modified tire sealant mixing device
US-10124511-B2 · Nov 13, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B29C48/52?
- CPC B29C48/52 is the Cooperative Patent Classification code for “with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance.”
- How many patents are filed under CPC B29C48/52 (with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC B29C48/52 growing?
- Publication counts under this code: 3 in 2024 vs 4 in 2025 (latest complete years).