Multi-stage compressor having interstage lubricant injection via an injection rod
US-12146494-B2 · Nov 19, 2024 · US
having complementary function
having complementary function · 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 | F04C23/003 |
| Official title | {having complementary function} |
| Display label | having complementary function |
| Total patents | 62 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 5 |
| 2017 | 9 |
| 2018 | 11 |
| 2019 | 9 |
| 2020 | 4 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multi-stage pump apparatus including sealing member
US-12049894-B2 · Jul 30, 2024 · US
Multi-stage compressor having interstage lubricant injection via an injection rod
US-2024003347-A1 · Jan 4, 2024 · US
Rotary piston compressor and system for temperature conditioning with rotary piston compressor
US-11841019-B2 · Dec 12, 2023 · US
Vacuum pump
US-2023323879-A1 · Oct 12, 2023 · US
Multi-stage compressor having interstage lubricant injection via an injection rod
US-11781547-B2 · Oct 10, 2023 · US
Method to operate a vacuum system
US-2023107879-A1 · Apr 6, 2023 · US
Multi-stage rotary vane pump
US-11592024-B2 · Feb 28, 2023 · US
Pump apparatus
US-2022389930-A1 · Dec 8, 2022 · US
Multi-stage compressor having interstage lubricant injection via an injection rod
US-11215182-B2 · Jan 4, 2022 · US
Dryer for compressed gas, compressor installation provided with such a dryer and method for drying gas
US-11173448-B2 · Nov 16, 2021 · US
Rotary piston compressor and system for temperature conditioning with rotary piston compressor
US-2021285441-A1 · Sep 16, 2021 · US
Screw compressor
US-11067082-B2 · Jul 20, 2021 · US
Suction line arrangement for multiple compressor system
US-10941772-B2 · Mar 9, 2021 · US
Rotary-type compressor
US-10851782-B2 · Dec 1, 2020 · US
Rotary compressor
US-10738779-B2 · Aug 11, 2020 · US
Co-rotating compressor with multiple compression mechanisms
US-10718330-B2 · Jul 21, 2020 · US
Dryer for compressed gas, compressor installation provided with such a dryer and method for drying gas
US-2020054992-A1 · Feb 20, 2020 · US
Dryer for compressed gas, compressor installation provided with such a dryer and method for drying gas
US-10478771-B2 · Nov 19, 2019 · US
Compressor, air conditioning system, and a method of controlling a compressor
US-10465683-B2 · Nov 5, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C23/003?
- CPC F04C23/003 is the Cooperative Patent Classification code for “having complementary function.”
- How many patents are filed under CPC F04C23/003 (having complementary function)?
- Our database includes 62 publications tagged with this CPC code.
- Is patent activity under CPC F04C23/003 growing?
- Publication counts under this code: 3 in 2024 vs 2 in 2025 (latest complete years).