Hermetic compressor
US-12421949-B2 · Sep 23, 2025 · US
with an auxiliary oil pump
with an auxiliary oil pump · 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 | F04B39/0261 |
| Official title | {with an auxiliary oil pump} |
| Display label | with an auxiliary oil pump |
| Total patents | 56 |
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 | 3 |
| 2017 | 6 |
| 2018 | 5 |
| 2019 | 6 |
| 2020 | 5 |
| 2021 | 5 |
| 2022 | 10 |
| 2023 | 4 |
| 2024 | 4 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System and method of starting air compressor in low-temperature state
US-12385478-B2 · Aug 12, 2025 · US
Compressor
US-12253085-B2 · Mar 18, 2025 · US
Reciprocating compressor with dual oil pump
US-2025075692-A1 · Mar 6, 2025 · US
Noise reduction media for a reciprocating compressor
US-12228119-B2 · Feb 18, 2025 · US
Oil feeder and linear compressor including the same
US-12180955-B2 · Dec 31, 2024 · US
Control method and control device applied to electric fracturing apparatus
US-12163510-B2 · Dec 10, 2024 · US
Noise reduction media for a reciprocating compressor
US-2024175434-A1 · May 30, 2024 · US
Compressor having orbiting scroll supply hole to lubricate thrust surface
US-11953005-B2 · Apr 9, 2024 · US
Refrigerant Compressor Unit
US-2023384003-A1 · Nov 30, 2023 · US
Oil feeder and linear compressor including the same
US-2023332597-A1 · Oct 19, 2023 · US
Compressor, refrigerant compressing apparatus, and refrigerating apparatus
US-11773838-B2 · Oct 3, 2023 · US
Compressor and compressor system
US-2023296091-A1 · Sep 21, 2023 · US
Compressor
US-2022412352-A1 · Dec 29, 2022 · US
Lubricating oil supply apparatus and compressor using lubricating oil supply apparatus
US-11536272-B2 · Dec 27, 2022 · US
Control method and control device applied to electric fracturing apparatus
US-2022307359-A1 · Sep 29, 2022 · US
Heat dissipation assembly for a linear compressor
US-11421922-B2 · Aug 23, 2022 · US
System and method of starting air compressor in low-temperature state
US-2022220954-A1 · Jul 14, 2022 · US
Hermetic compressor
US-2022170475-A1 · Jun 2, 2022 · US
Hermetic compressor
US-2022145872-A1 · May 12, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B39/0261?
- CPC F04B39/0261 is the Cooperative Patent Classification code for “with an auxiliary oil pump.”
- How many patents are filed under CPC F04B39/0261 (with an auxiliary oil pump)?
- Our database includes 56 publications tagged with this CPC code.
- Is patent activity under CPC F04B39/0261 growing?
- Publication counts under this code: 4 in 2024 vs 5 in 2025 (latest complete years).