Fluid conduits with selectively coated surfaces
US-2022178490-A1 · Jun 9, 2022 · US
Rigid pipes
Rigid pipes · 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 | F16L9/00 |
| Official title | Rigid pipes |
| Display label | Rigid pipes |
| Total patents | 69 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 15 |
| 2016 | 11 |
| 2017 | 2 |
| 2018 | 9 |
| 2019 | 7 |
| 2020 | 10 |
| 2021 | 5 |
| 2022 | 5 |
| 2023 | 1 |
| 2024 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multilayer composite comprising a fluoropolymer layer
US-11135821-B2 · Oct 5, 2021 · US
Segmental tubes
US-2021140567-A1 · May 13, 2021 · US
System for hydrocarbon recovery
US-2021108479-A1 · Apr 15, 2021 · US
Power swivel and gooseneck
US-10947796-B2 · Mar 16, 2021 · US
Segmental tubes
US-10941886-B2 · Mar 9, 2021 · US
Optical waveguide for use with a cable or line
US-10859749-B2 · Dec 8, 2020 · US
System for hydrocarbon recovery
US-10808483-B2 · Oct 20, 2020 · US
Tailor-layered tube with thickness deviations and method of manufacturing the same
US-10801647-B2 · Oct 13, 2020 · US
Power swivel and gooseneck
US-2020248513-A1 · Aug 6, 2020 · US
Steel material for composite pressure vessel liner and steel pipe or tube for composite pressure vessel liner
US-10697036-B2 · Jun 30, 2020 · US
Tailor-layered tube with thickness deviations and method of manufacturing the same
US-2020200296-A1 · Jun 25, 2020 · US
Optical waveguide for use with a cable or line
US-2020166685-A1 · May 28, 2020 · US
High strength electric resistance welded steel pipe and method for producing high strength electric resistance welded steel pipe
US-10640843-B2 · May 5, 2020 · US
Steel material and oil-well steel pipe
US-10550962-B2 · Feb 4, 2020 · US
Composite component and manufacture thereof
US-2020023566-A1 · Jan 23, 2020 · US
Piping system
US-10518296-B2 · Dec 31, 2019 · US
Multilayer composite comprising layers of partly aromatic polyamides
US-10464296-B2 · Nov 5, 2019 · US
Multilayer composite comprising a polyester layer
US-10427390-B2 · Oct 1, 2019 · US
Method for producing a tubular body with reduced internal stress by using 3d printing, and a tubular body with reduced internal stress
US-2019263050-A1 · Aug 29, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16L9/00?
- CPC F16L9/00 is the Cooperative Patent Classification code for “Rigid pipes.”
- How many patents are filed under CPC F16L9/00 (Rigid pipes)?
- Our database includes 69 publications tagged with this CPC code.
- Is patent activity under CPC F16L9/00 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).