F01C 2021/12
Control of working fluid admission or discharge
Official title: {Control of working fluid admission or discharge}
F01C2021/12 (Control of working fluid admission or discharge) appears on 8 US grants and 9 published applications in this corpus.
Search patents in F01C- Granted patents
- 8
- Published applications
- 9
- Assignees
- 4
- Inventors
- 14
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 1 |
| 2021 | 0 | 2 |
| 2022 | 3 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 2 | 1 |
By publication year. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Coulisse—eccentric motor21 Jul 2026US 12,687,157 B2
- Rotary piston machine3 Feb 2026US 12,540,572 B2
- Multi-injection port rotary engine apparatus and method of use thereof20 Dec 2022US 11,530,642 B2
- System for controlling admission volume of inlet gas for fixed RPM operation of rotary or reciprocating expander20 Sep 2022US 11,448,073 B2Indian Institute of Technology Madras (Iit Madras)
- Rotary internal combustion engine with unequal volumetric ratios1 Mar 2022US 11,261,781 B2Pratt & Whitney Canada Corp.
- Coulisse - eccentric motor2 Apr 2026US 2026/0092598 A1
- Rotary piston machine10 Apr 2025US 2025/0116223 A1
- Wankel pump cycle residual boost system20 Jul 2023US 2023/0228195 A1
- Controlling admission volume of inlet gas for fixed rpm operation of rotary or reciprocating expander9 Dec 2021US 2021/0381379 A1Indian Institute of Technology Madras (Iit Madras)
- Multi-injection port rotary engine apparatus and method of use thereof11 Mar 2021US 2021/0071530 A1
Most cited
By later US patents