Fluid storage tank with plurality of partition plates
US-10145508-B2 · Dec 4, 2018 · US
Welding
Welding · 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 | F17C2209/221 |
| Official title | Welding |
| Display label | Welding |
| Total patents | 239 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 26 |
| 2017 | 17 |
| 2018 | 21 |
| 2019 | 25 |
| 2020 | 21 |
| 2021 | 22 |
| 2022 | 24 |
| 2023 | 22 |
| 2024 | 24 |
| 2025 | 20 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Two-part container assembly for compressed air
US-2018187835-A1 · Jul 5, 2018 · US
Hybrid tanks
US-2018156388-A1 · Jun 7, 2018 · US
Fiberwound tanks
US-2018080607-A1 · Mar 22, 2018 · US
Cryogenic liquid tank
US-9829155-B2 · Nov 28, 2017 · US
Composite pressure vessels
US-9822928-B2 · Nov 21, 2017 · US
Conformable pressure vessel
US-2017327237-A1 · Nov 16, 2017 · US
Heat-insulation system for liquefied natural gas cargo hold
US-2017320549-A1 · Nov 9, 2017 · US
Low temperature fluid dual structure pipe and low temperature fluid dual structure storage tank
US-2017307112-A1 · Oct 26, 2017 · US
Sealed tank with corrugated sealing membranes
US-2017292652-A1 · Oct 12, 2017 · US
Method for constructing cylindrical tank
US-2017247877-A1 · Aug 31, 2017 · US
Storage tank containment system
US-9708120-B2 · Jul 18, 2017 · US
Sealed and thermally insulating tank for storing a fluid
US-9677711-B2 · Jun 13, 2017 · US
Corner structure of a sealed and thermally insulating tank for storing a fluid
US-9677710-B2 · Jun 13, 2017 · US
Arrangement for connecting a pipe to a LNG tank
US-9664317-B2 · May 30, 2017 · US
Reinforcing member for corrugated membrane of lng cargo tank, membrane assembly having the reinforcing member and method for constructing the same
US-2017108169-A1 · Apr 20, 2017 · US
Impermeable and thermally insulated tank comprising a metal membrane that is corrugated in orthogonal folds
US-2017074455-A1 · Mar 16, 2017 · US
High pressure tank, manufacturing method of high pressure tank, and inspection method of sealing characteristic
US-2017038006-A1 · Feb 9, 2017 · US
Insulation panel for corner area of lng cargo containment system
US-2017038007-A1 · Feb 9, 2017 · US
Container having an internal structure with minimum surfaces
US-2017030519-A1 · Feb 2, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F17C2209/221?
- CPC F17C2209/221 is the Cooperative Patent Classification code for “Welding.”
- How many patents are filed under CPC F17C2209/221 (Welding)?
- Our database includes 239 publications tagged with this CPC code.
- Is patent activity under CPC F17C2209/221 growing?
- Publication counts under this code: 24 in 2024 vs 20 in 2025 (latest complete years).