Fluid end with clamped retention
US-12352356-B2 · Jul 8, 2025 · US
with sealing rings made of metal
with sealing rings made of metal · 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 | F16J15/28 |
| Official title | with sealing rings made of metal |
| Display label | with sealing rings made of metal |
| Total patents | 64 |
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 | 1 |
| 2017 | 2 |
| 2018 | 5 |
| 2019 | 7 |
| 2020 | 8 |
| 2021 | 11 |
| 2022 | 6 |
| 2023 | 6 |
| 2024 | 7 |
| 2025 | 8 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fluid end assembly
US-12345254-B2 · Jul 1, 2025 · US
Annular seal material and manufacturing method
US-2025205939-A1 · Jun 26, 2025 · US
Fluid end assembly
US-2025075695-A1 · Mar 6, 2025 · US
Fluid end assembly
US-12135024-B2 · Nov 5, 2024 · US
Gland packing and packing structure
US-12085171-B2 · Sep 10, 2024 · US
Seal stack assembly
US-12066107-B2 · Aug 20, 2024 · US
High-pressure seal for a liquid jet cutting system
US-12064893-B2 · Aug 20, 2024 · US
Fluid end with clamped retention
US-2024200657-A1 · Jun 20, 2024 · US
Fluid end assembly
US-2024068469-A1 · Feb 29, 2024 · US
Piston seal ring
US-11892083-B2 · Feb 6, 2024 · US
Seal stack assembly
US-2023383843-A1 · Nov 30, 2023 · US
Piston Seal Ring
US-2023323950-A1 · Oct 12, 2023 · US
Seal stack assembly
US-11761540-B2 · Sep 19, 2023 · US
Automatic wiper for seal stack assembly
US-11692631-B2 · Jul 4, 2023 · US
Method of manufacturing a wheel hub bearing unit for vehicles and associated wheel hub bearing unit
US-11619304-B2 · Apr 4, 2023 · US
Fluid cylinder sleeve assembly
US-2023041201-A1 · Feb 9, 2023 · US
Radial seal segment joint
US-11525515-B2 · Dec 13, 2022 · US
Seal chain
US-11499605-B2 · Nov 15, 2022 · US
Seal member for bearing and production method therefor
US-11371611-B2 · Jun 28, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16J15/28?
- CPC F16J15/28 is the Cooperative Patent Classification code for “with sealing rings made of metal.”
- How many patents are filed under CPC F16J15/28 (with sealing rings made of metal)?
- Our database includes 64 publications tagged with this CPC code.
- Is patent activity under CPC F16J15/28 growing?
- Publication counts under this code: 7 in 2024 vs 8 in 2025 (latest complete years).