Advanced visco-seals for single screw extruders
US-2026042250-A1 · Feb 12, 2026 · US
having grooves or cavities other than the thread or the channel
having grooves or cavities other than the thread or the channel · 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 | B29C48/56 |
| Official title | having grooves or cavities other than the thread or the channel |
| Display label | having grooves or cavities other than the thread or the channel |
| Total patents | 31 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 2 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 2 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
In Situ Exfoliation Method to Fabricate a Graphene-Reinforced Polymer Matrix Composite
US-2026035540-A1 · Feb 5, 2026 · US
In situ exfoliation method to fabricate a graphene-reinforced polymer matrix composite
US-12460064-B2 · Nov 4, 2025 · US
Production method for heat-resistant resin composition
US-12427704-B2 · Sep 30, 2025 · US
Molding apparatus, cigarette filter rod and preparation method thereof
US-12133550-B2 · Nov 5, 2024 · US
Treatment element for a treatment element shaft of a screw machine, and method for producing a treatment element
US-12083729-B2 · Sep 10, 2024 · US
Production method for heat-resistant resin composition
US-2023311394-A1 · Oct 5, 2023 · US
Shearing part
US-11639016-B2 · May 2, 2023 · US
Single-screw extruder with hollow rotor member
US-11548198-B2 · Jan 10, 2023 · US
Covalent conjugates of graphene nanoparticles and polymer chains and composite materials formed therefrom
US-11479652-B2 · Oct 25, 2022 · US
Molding apparatus, cigarette filter rod and preparation method thereof
US-2022022528-A1 · Jan 27, 2022 · US
In Situ Exfoliation Method to Fabricate a Graphene-Reinforced Polymer Matrix Composite
US-2021363321-A1 · Nov 25, 2021 · US
In situ exfoliation method to fabricate a graphene-reinforced polymer matrix composite
US-11098175-B2 · Aug 24, 2021 · US
Treatment element for a treatment element shaft of a screw machine, and method for producing a treatment element
US-2021252763-A1 · Aug 19, 2021 · US
Shearing part
US-2020298458-A1 · Sep 24, 2020 · US
Covalent Conjugates of Graphene Nanoparticles and Polymer Chains and Composite Materials Formed Therefrom
US-2020048425-A1 · Feb 13, 2020 · US
Single-screw extruder with hollow rotor member
US-2019184621-A1 · Jun 20, 2019 · US
In Situ Exfoliation Method to Fabricate a Graphene-Reinforced Polymer Matrix Composite
US-2019062521-A1 · Feb 28, 2019 · US
Mixing elements having an improved dispersing effect
US-10207424-B2 · Feb 19, 2019 · US
In situ exfoliation method to fabricate a graphene-reinforced polymer matrix composite (G-PMC)
US-9896565-B2 · Feb 20, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B29C48/56?
- CPC B29C48/56 is the Cooperative Patent Classification code for “having grooves or cavities other than the thread or the channel.”
- How many patents are filed under CPC B29C48/56 (having grooves or cavities other than the thread or the channel)?
- Our database includes 31 publications tagged with this CPC code.
- Is patent activity under CPC B29C48/56 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).