Rubber composition and power steering hose
US-2026042902-A1 · Feb 12, 2026 · US
with four or more layers without reinforcement
with four or more layers without reinforcement · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F16L11/045 |
| Official title | {with four or more layers without reinforcement} |
| Display label | with four or more layers without reinforcement |
| Total patents | 57 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 8 |
| 2019 | 5 |
| 2020 | 5 |
| 2021 | 8 |
| 2022 | 5 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 6 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multilayer tubing for chemical transfer applications
US-12442471-B2 · Oct 14, 2025 · US
Rubber composition for hose, and hose
US-2025304766-A1 · Oct 2, 2025 · US
Multilayer Tube
US-2025257821-A1 · Aug 14, 2025 · US
Multilayer tubular structure intended for transporting a heat-transfer fluid
US-2025207693-A1 · Jun 26, 2025 · US
Transport method, refrigeration method, refrigeration system, and hose for refrigeration system
US-2025123037-A1 · Apr 17, 2025 · US
Veneer type tube or hose with diffusion barrier
US-2025035240-A1 · Jan 30, 2025 · US
Pfas-free thermoplastic multilayer fuel line
US-2024426402-A1 · Dec 26, 2024 · US
Flexible high-pressure fluid conveying pipe
US-12103266-B2 · Oct 1, 2024 · US
Hollow structure for fuel
US-2024218946-A1 · Jul 4, 2024 · US
Hose with rubber and plastic
US-11680665-B2 · Jun 20, 2023 · US
Multilayer tubular structure having better resistance to extraction in biofuel and use thereof
US-2023151909-A1 · May 18, 2023 · US
Insulated hose arrangements
US-11614183-B2 · Mar 28, 2023 · US
Multilayer tubular structure having better resistance to extraction in biofuel and use thereof
US-11598452-B2 · Mar 7, 2023 · US
Ink supply tube
US-2023023875-A1 · Jan 26, 2023 · US
Extreme high-temperature resistant multilayered diesel exhaust fluid tubing
US-11519528-B2 · Dec 6, 2022 · US
Fluid line having a pipe
US-2022252186-A1 · Aug 11, 2022 · US
Multilayer tubing for chemical transfer applications
US-2022170574-A1 · Jun 2, 2022 · US
Multilayer tubular structure having better resistance to extraction in biofuel and use thereof
US-11339899-B2 · May 24, 2022 · US
Extreme high-temperature resistant multilayered diesel exhaust fluid tubing
US-2022128177-A1 · Apr 28, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16L11/045?
- CPC F16L11/045 is the Cooperative Patent Classification code for “with four or more layers without reinforcement.”
- How many patents are filed under CPC F16L11/045 (with four or more layers without reinforcement)?
- Our database includes 57 publications tagged with this CPC code.
- Is patent activity under CPC F16L11/045 growing?
- Publication counts under this code: 3 in 2024 vs 6 in 2025 (latest complete years).