Cupseal for compressor and method for preparing the same
US-11773976-B2 · Oct 3, 2023 · US
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Oscillating-piston pumps specially adapted for elastic fluids
Oscillating-piston pumps specially adapted for elastic fluids · 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 | F04C21/00 |
| Official title | Oscillating-piston pumps specially adapted for elastic fluids |
| Display label | Oscillating-piston pumps specially adapted for elastic fluids |
| Total patents | 13 |
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 | 1 |
| 2017 | 2 |
| 2019 | 3 |
| 2020 | 1 |
| 2021 | 4 |
| 2022 | 1 |
| 2023 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Miniature optical particulate matter sensor module
US-11359621-B2 · Jun 14, 2022 · US
Cupseal for compressor and method for preparing the same
US-2021388902-A1 · Dec 16, 2021 · US
Oscillating piston-type compressor
US-10968911-B2 · Apr 6, 2021 · US
Gas ejection apparatus
US-10962007-B2 · Mar 30, 2021 · US
Miniature optical particulate matter sensor module
US-2021018421-A1 · Jan 21, 2021 · US
Miniature optical particulate matter sensor module
US-10837891-B2 · Nov 17, 2020 · US
Miniature optical particulate matter sensor module
US-2019178775-A1 · Jun 13, 2019 · US
Gas ejection apparatus
US-2019145413-A1 · May 16, 2019 · US
Oscillating piston-type compressor
US-2019085845-A1 · Mar 21, 2019 · US
Electric compressor
US-2017284395-A1 · Oct 5, 2017 · US
Electric compressor
US-2017284396-A1 · Oct 5, 2017 · US
Compressor
US-8926295-B2 · Jan 6, 2015 · US