Method of manufacturing variable wall thickness steel pipe and variable wall thickness steel pipe
US-11590547-B2 · Feb 28, 2023 · US
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conical tubes
conical tubes · 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 | B21C37/18 |
| Official title | conical tubes |
| Display label | conical tubes |
| Total patents | 6 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2019 | 2 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for manufacturing pipe
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Method for manufacturing pipe
US-2021245221-A1 · Aug 12, 2021 · US
Method of manufacturing variable wall thickness steel pipe and variable wall thickness steel pipe
US-2019076902-A1 · Mar 14, 2019 · US
Tube diameter expanding method and forming apparatus
US-2019076903-A1 · Mar 14, 2019 · US
Torsional extreme-plastic processing method of conic metal pipe
US-9447487-B2 · Sep 20, 2016 · US