Compressor Having Capacity Modulation System
US-2026028988-A1 · Jan 29, 2026 · US
using lift valves
using lift valves · 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 | F04C28/16 |
| Official title | using lift valves |
| Display label | using lift valves |
| Total patents | 62 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 8 |
| 2017 | 9 |
| 2018 | 9 |
| 2019 | 7 |
| 2020 | 2 |
| 2021 | 5 |
| 2022 | 2 |
| 2023 | 4 |
| 2024 | 6 |
| 2025 | 2 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Compressor Having Capacity Modulation System
US-2026028990-A1 · Jan 29, 2026 · US
Compressor Having Capacity Modulation System
US-2025327449-A1 · Oct 23, 2025 · US
Scroll compressor with center hub
US-12188470-B2 · Jan 7, 2025 · US
Retainer block bypass hole valve assembly arranged in non-orbiting scroll of a compressor
US-12098723-B2 · Sep 24, 2024 · US
Injection valve assembly for a compressor
US-12006938-B1 · Jun 11, 2024 · US
Compressor and valve assembly
US-11965507-B1 · Apr 23, 2024 · US
Scroll compressor
US-2024102469-A1 · Mar 28, 2024 · US
Scroll Compressor With Center Hub
US-2024052836-A1 · Feb 15, 2024 · US
Scroll compressor
US-11867173-B2 · Jan 9, 2024 · US
Scroll compressor with center hub
US-11846287-B1 · Dec 19, 2023 · US
Economizer port valve
US-2023375237-A1 · Nov 23, 2023 · US
Modulated Compressor And Valve Assembly
US-2023296097-A1 · Sep 21, 2023 · US
Scroll compressor
US-11703053-B2 · Jul 18, 2023 · US
Vane rotary compressor
US-11346344-B2 · May 31, 2022 · US
Scroll compressor
US-2022136501-A1 · May 5, 2022 · US
Scroll compressor having a valve assembly controlling the opening/closing valve to open and close communication passage and bypass holes on fixed scroll
US-11204035-B2 · Dec 21, 2021 · US
Variable volume ratio compressor
US-11022119-B2 · Jun 1, 2021 · US
Multi-stage rotary piston pump
US-2021140430-A1 · May 13, 2021 · US
Compressor comprising a variable volume index valve
US-10954943-B2 · Mar 23, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C28/16?
- CPC F04C28/16 is the Cooperative Patent Classification code for “using lift valves.”
- How many patents are filed under CPC F04C28/16 (using lift valves)?
- Our database includes 62 publications tagged with this CPC code.
- Is patent activity under CPC F04C28/16 growing?
- Publication counts under this code: 6 in 2024 vs 2 in 2025 (latest complete years).