Passive chemical injection system for controlling a nuclear reaction by delivering a neutron-absorbing chemical into a containment vessel
US-12537110-B2 · Jan 27, 2026 · US
by an absorbent fluid
by an absorbent fluid · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G21C9/033 |
| Official title | by an absorbent fluid |
| Display label | by an absorbent fluid |
| Total patents | 39 |
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 | 3 |
| 2016 | 4 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 5 |
| 2021 | 6 |
| 2022 | 8 |
| 2023 | 2 |
| 2024 | 5 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Gadolinium oxide nano particles in coolant for reactivity control
US-2025149193-A1 · May 8, 2025 · US
Controlling a power output of a nuclear reaction using chemical injection
US-2024404716-A1 · Dec 5, 2024 · US
Passive chemical injection system for controlling a nuclear reaction by delivering a neutron-absorbing chemical into a containment vessel
US-2024355488-A1 · Oct 24, 2024 · US
Controlling a power output of a nuclear reaction using chemical injection
US-12100523-B2 · Sep 24, 2024 · US
Boiling water reactors
US-2024312650-A1 · Sep 19, 2024 · US
Controlling a power output of a nuclear reactor without using control rods
US-11996208-B2 · May 28, 2024 · US
Very simplified boiling water reactors for commercial electricity generation
US-11742099-B2 · Aug 29, 2023 · US
Passive containment cooling system for a nuclear reactor
US-11569000-B2 · Jan 31, 2023 · US
Boron injection system for controlling a nuclear reaction by delivering boron into a containment vessel
US-11527334-B2 · Dec 13, 2022 · US
Passive containment cooling system for a nuclear reactor
US-2022367076-A1 · Nov 17, 2022 · US
Controlling a nuclear reaction
US-2022367073-A1 · Nov 17, 2022 · US
Controlling a nuclear reaction
US-2022246317-A1 · Aug 4, 2022 · US
Controlling a power output of a nuclear reaction without control rods
US-11380448-B2 · Jul 5, 2022 · US
Passive containment cooling system for a nuclear reactor
US-11373769-B2 · Jun 28, 2022 · US
Controlling a power output of a nuclear reaction without control rods
US-11309094-B2 · Apr 19, 2022 · US
Reactor shutdown system with melting gate member for segregating neutron absorbing material compartment from core
US-11289215-B2 · Mar 29, 2022 · US
Dry stand-by liquid control system for a nuclear reactor
US-11200992-B2 · Dec 14, 2021 · US
Dry stand-by liquid control system for a nuclear reactor
US-2021202114-A1 · Jul 1, 2021 · US
Passive containment cooling system for a nuclear reactor
US-2021193338-A1 · Jun 24, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G21C9/033?
- CPC G21C9/033 is the Cooperative Patent Classification code for “by an absorbent fluid.”
- How many patents are filed under CPC G21C9/033 (by an absorbent fluid)?
- Our database includes 39 publications tagged with this CPC code.
- Is patent activity under CPC G21C9/033 growing?
- Publication counts under this code: 5 in 2024 vs 1 in 2025 (latest complete years).