Sludge lance for cleaning a steam generator
US-2025251202-A1 · Aug 7, 2025 · US
from external surfaces of heat exchange conduits
from external surfaces of heat exchange conduits · 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 | F28G1/166 |
| Official title | {from external surfaces of heat exchange conduits} |
| Display label | from external surfaces of heat exchange conduits |
| Total patents | 40 |
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 | 1 |
| 2016 | 4 |
| 2017 | 3 |
| 2018 | 5 |
| 2019 | 5 |
| 2020 | 6 |
| 2021 | 9 |
| 2022 | 4 |
| 2023 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Clothes care apparatus and method for controlling the same
US-2025075387-A1 · Mar 6, 2025 · US
Method for manufacturing water absorbent resin
US-2023149981-A1 · May 18, 2023 · US
Cooling package cleaning system
US-11428481-B2 · Aug 30, 2022 · US
Reciprocating spray cleaning system for air-cooled heat exchangers
US-11408694-B2 · Aug 9, 2022 · US
Cleaning apparatus for heat exchanger and polishing apparatus
US-11383345-B2 · Jul 12, 2022 · US
Air-cooled heat exchanger cleaning and temperature control apparatus
US-11287198-B2 · Mar 29, 2022 · US
Steam generator dual head sludge lance
US-11209159-B2 · Dec 28, 2021 · US
Combined power generation apparatus
US-11149592-B2 · Oct 19, 2021 · US
Reciprocating spray cleaning system for air-cooled heat exchangers
US-2021291206-A1 · Sep 23, 2021 · US
Heat exchanger spray tube
US-11105569-B2 · Aug 31, 2021 · US
Flexible lance for machining or inspecting a tubesheet of a boiler
US-11060718-B2 · Jul 13, 2021 · US
Cleanout systems for use with aircraft
US-11040777-B2 · Jun 22, 2021 · US
Cooling package cleaning system
US-2021170455-A1 · Jun 10, 2021 · US
Air-cooled heat exchanger cleaning and temperature control apparatus
US-2021123697-A1 · Apr 29, 2021 · US
Air-cooled heat exchanger cleaning and temperature control apparatus and method
US-10907914-B2 · Feb 2, 2021 · US
Cleaning apparatus for heat exchanger and polishing apparatus
US-2020306920-A1 · Oct 1, 2020 · US
Heat exchanger spray tub
US-2020284534-A1 · Sep 10, 2020 · US
Heat exchanger exterior surface cleaning system, method of retrofitting a heat exchanger with a cleaning system, and method of cleaning a heat exchanger
US-2020208928-A1 · Jul 2, 2020 · US
Multiple tube-type heat exchanger and heat transfer tube cleaning method for same
US-10697714-B2 · Jun 30, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F28G1/166?
- CPC F28G1/166 is the Cooperative Patent Classification code for “from external surfaces of heat exchange conduits.”
- How many patents are filed under CPC F28G1/166 (from external surfaces of heat exchange conduits)?
- Our database includes 40 publications tagged with this CPC code.
- Is patent activity under CPC F28G1/166 growing?
- Publication counts under this code: 1 in 2023 vs 2 in 2025 (latest complete years).