Heat exchanger
US-2026078968-A1 · Mar 19, 2026 · US
using obturating elements, e.g. washers, inserted and operated independently of each other (F28F11/06 takes precedence)
using obturating elements, e.g. washers, inserted and operated independently of each other (F28F11/06 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 | F28F11/02 |
| Official title | using obturating elements, e.g. washers, inserted and operated independently of each other (F28F11/06 takes precedence) |
| Display label | using obturating elements, e.g. washers, inserted and operated independently of each other (F28F11/06 takes precedence) |
| Total patents | 33 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 2 |
| 2017 | 7 |
| 2018 | 4 |
| 2019 | 2 |
| 2020 | 4 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Integrated heat exchanger
US-12092407-B2 · Sep 17, 2024 · US
Pipe connection arrangement for a heat exchanger
US-12038244-B2 · Jul 16, 2024 · US
Ceramic tube plug
US-2024175647-A1 · May 30, 2024 · US
Heat exchanger arrangement
US-11740034-B2 · Aug 29, 2023 · US
Centre body in spiral heat exchanger
US-11333439-B2 · May 17, 2022 · US
Heat exchanger arrangement
US-2022065558-A1 · Mar 3, 2022 · US
Pipe connection arrangement for a heat exchanger
US-2021333057-A1 · Oct 28, 2021 · US
Pressure vessel
US-11145423-B2 · Oct 12, 2021 · US
Centre body in spiral heat exchanger
US-2021123682-A1 · Apr 29, 2021 · US
A seal and a tubular heat exchanger using such seal
US-2021018279-A1 · Jan 21, 2021 · US
Integrated heat exchanger
US-2020271398-A1 · Aug 27, 2020 · US
Plugging a heat exchanger tube
US-10724808-B2 · Jul 28, 2020 · US
Exhaust heat recovery unit
US-10563558-B2 · Feb 18, 2020 · US
Plugging a heat exchanger tube
US-2020049431-A1 · Feb 13, 2020 · US
Pressure vessel
US-2019259504-A1 · Aug 22, 2019 · US
Replacement tube plug for heat exchanger
US-10168111-B2 · Jan 1, 2019 · US
Method of predicting wear on tubes of steam generator
US-10125975-B2 · Nov 13, 2018 · US
Exhaust heat recovery unit
US-2018298803-A1 · Oct 18, 2018 · US
Device for closing inner tubes in a tubular heat exchanger
US-10012452-B2 · Jul 3, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F28F11/02?
- CPC F28F11/02 is the Cooperative Patent Classification code for “using obturating elements, e.g. washers, inserted and operated independently of each other (F28F11/06 takes precedence).”
- How many patents are filed under CPC F28F11/02 (using obturating elements, e.g. washers, inserted and operated independently of each other (F28F11/06 takes precedence))?
- Our database includes 33 publications tagged with this CPC code.
- Is patent activity under CPC F28F11/02 growing?
- Publication counts under this code: 1 in 2023 vs 3 in 2024 (latest complete years).