Opening maching apparatus for heat transfer tube, method of forming opening in tube wall of heat transfer tube using same, and method of removing foreign material through same opening of same heat transfer tube
US-12485462-B2 · Dec 2, 2025 · US
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De-sludging or blow-down devices {(F22B37/565 takes precedence)}
De-sludging or blow-down devices {(F22B37/565 takes precedence)} · 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 | F22B37/54 |
| Official title | De-sludging or blow-down devices {(F22B37/565 takes precedence)} |
| Display label | De-sludging or blow-down devices {(F22B37/565 takes precedence)} |
| Total patents | 20 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 3 |
| 2018 | 3 |
| 2019 | 3 |
| 2021 | 4 |
| 2023 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Apparatus and method of removing foreign substances from steam generator
US-12345412-B2 · Jul 1, 2025 · US
Apparatus and method of removing foreign substances from steam generator
US-2023138837-A1 · May 4, 2023 · US
Electrical household appliance comprising a base having a gravity-fed boiling chamber
US-11141036-B2 · Oct 12, 2021 · US
Flexible lance for machining or inspecting a tubesheet of a boiler
US-11060718-B2 · Jul 13, 2021 · US
Electrical household appliance comprising a base having a gravity-fed boiling chamber
US-10941516-B2 · Mar 9, 2021 · US
Flexible cleaning lance positioner guide apparatus
US-10898931-B2 · Jan 26, 2021 · US
Cleaning lance rotator drive apparatus
US-10265736-B2 · Apr 23, 2019 · US
Electrical household appliance comprising a base having a gravity-fed boiling chamber
US-2019106835-A1 · Apr 11, 2019 · US
Electrical household appliance comprising a base having a gravity-fed boiling chamber
US-2019104907-A1 · Apr 11, 2019 · US
Flexible lance for machining or inspecting a tubesheet of a boiler
US-2018347807-A1 · Dec 6, 2018 · US
Flexible cleaning lance positioner guide apparatus
US-2018207686-A1 · Jul 26, 2018 · US
Flexible cleaning lance positioner guide apparatus
US-9950348-B2 · Apr 24, 2018 · US
Steam generator and heating cooker comprising steam generator
US-9841182-B2 · Dec 12, 2017 · US
Method and apparatus for manipulating equipment inside a steam generator
US-9791145-B2 · Oct 17, 2017 · US
Controlling cooling flow in a sootblower based on lance tube temperature
US-9671183-B2 · Jun 6, 2017 · US
Cleaning lance rotator drive apparatus
US-2016158809-A1 · Jun 9, 2016 · US
Flexible cleaning lance postioner guide apparatus
US-2016096202-A1 · Apr 7, 2016 · US
Chemical cleaning method and system with steam injection
US-8999072-B2 · Apr 7, 2015 · US
Steam generator and heating cooker comprising steam generator
US-2015083110-A1 · Mar 26, 2015 · US