Scroll compressor
US-2025264101-A1 · Aug 21, 2025 · US
specially adapted for reversible pumps
specially adapted for reversible pumps · 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 | F04C28/04 |
| Official title | specially adapted for reversible pumps |
| Display label | specially adapted for reversible pumps |
| Total patents | 25 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 1 |
| 2017 | 3 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Pump device
US-12345255-B2 · Jul 1, 2025 · US
Vacuum pump
US-11927190-B2 · Mar 12, 2024 · US
Fluid transfer apparatus with a plurality of rotor housings arranged at different angularity with the neighboring rotor housings
US-11867179-B2 · Jan 9, 2024 · US
Pump device
US-2023349377-A1 · Nov 2, 2023 · US
Rotary displacement compressor having a check valve and a backflow control valve arranged in series through a discharge pipe
US-11401934-B2 · Aug 2, 2022 · US
Electric compressor system for vehicle
US-11346345-B2 · May 31, 2022 · US
Vacuum pump
US-2021332820-A1 · Oct 28, 2021 · US
Methods and systems for preventing premature compressor failure from improper operation
US-11085686-B2 · Aug 10, 2021 · US
Fluid transfer apparatus
US-2021123438-A1 · Apr 29, 2021 · US
Electric compressor system for vehicle
US-2021123450-A1 · Apr 29, 2021 · US
Controls and operation of variable frequency drives
US-10746448-B2 · Aug 18, 2020 · US
Liquid injected screw compressor, controller for the transition from an unloaded state to a loaded state of such a screw compressor and method applied therewith
US-10704550-B2 · Jul 7, 2020 · US
Device for compressing and expanding a gas and method for controlling the pressure in two grids of a different nominal pressure level
US-10697457-B2 · Jun 30, 2020 · US
Methods and systems for preventing premature compressor failure from improper operation
US-2020116406-A1 · Apr 16, 2020 · US
Methods and systems for preventing premature compressor failure from improper operation
US-10520234-B2 · Dec 31, 2019 · US
Rotary Displacement Compressor
US-2019338773-A1 · Nov 7, 2019 · US
Controls and operation of variable frequency drives
US-10295239-B2 · May 21, 2019 · US
Methods and systems for preventing premature compressor failure from improper operation
US-2018320943-A1 · Nov 8, 2018 · US
Hydroelectric gear pump with varying helix angles of gear teeth
US-2017248019-A1 · Aug 31, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C28/04?
- CPC F04C28/04 is the Cooperative Patent Classification code for “specially adapted for reversible pumps.”
- How many patents are filed under CPC F04C28/04 (specially adapted for reversible pumps)?
- Our database includes 25 publications tagged with this CPC code.
- Is patent activity under CPC F04C28/04 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).