Sliding material and gas compressor
US-12522777-B2 · Jan 13, 2026 · US
sealing for a reciprocating rod (sealing in general F16J)
sealing for a reciprocating rod (sealing in general F16J) · 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 | F04B39/041 |
| Official title | {sealing for a reciprocating rod (sealing in general F16J)} |
| Display label | sealing for a reciprocating rod (sealing in general F16J) |
| Total patents | 35 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 4 |
| 2019 | 2 |
| 2020 | 5 |
| 2021 | 4 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Reciprocating compressor with a pressure-drop chamber and method
US-12504009-B2 · Dec 23, 2025 · US
Sealing ring for reciprocating pump
US-2025327518-A1 · Oct 23, 2025 · US
Positive displacement machine, compressor, cooling device, and electronic apparatus
US-12449168-B2 · Oct 21, 2025 · US
Sliding material and gas compressor
US-2025179387-A1 · Jun 5, 2025 · US
Wiping unit and can body maker
US-12269082-B2 · Apr 8, 2025 · US
A reciprocating compressor with a pressure-drop chamber and method
US-2024328411-A1 · Oct 3, 2024 · US
Multi-part sealing assembly
US-2024102460-A1 · Mar 28, 2024 · US
Wiping unit and can body maker
US-2023341054-A1 · Oct 26, 2023 · US
Linear compressor
US-11761683-B2 · Sep 19, 2023 · US
Positive displacement machine, compressor, cooling device, and electronic apparatus
US-2023097432-A1 · Mar 30, 2023 · US
Linear compressor
US-2021222915-A1 · Jul 22, 2021 · US
Linear compressor and sealed system for an appliance
US-2021095652-A1 · Apr 1, 2021 · US
Natural gas reciprocating compressor
US-10900476-B2 · Jan 26, 2021 · US
Seal assembly for reciprocating compressor
US-10883483-B2 · Jan 5, 2021 · US
Annular sealing assembly
US-10876634-B2 · Dec 29, 2020 · US
Reciprocating compressor
US-10837441-B2 · Nov 17, 2020 · US
Annular Sealing Assembly
US-2020332900-A1 · Oct 22, 2020 · US
Seal Assembly for Reciprocating Compressor
US-2020102946-A1 · Apr 2, 2020 · US
Seal assembly for a piston rod
US-10578090-B2 · Mar 3, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B39/041?
- CPC F04B39/041 is the Cooperative Patent Classification code for “sealing for a reciprocating rod (sealing in general F16J).”
- How many patents are filed under CPC F04B39/041 (sealing for a reciprocating rod (sealing in general F16J))?
- Our database includes 35 publications tagged with this CPC code.
- Is patent activity under CPC F04B39/041 growing?
- Publication counts under this code: 2 in 2024 vs 5 in 2025 (latest complete years).