Treating cooling water in iron production facilities, and associated systems, devices, and methods
US-2026054312-A1 · Feb 26, 2026 · US
Hopper cars (flat bottomed cars convertible into hoppers B61D3/06)
Hopper cars (flat bottomed cars convertible into hoppers B61D3/06) · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B61D7/00 |
| Official title | Hopper cars (flat bottomed cars convertible into hoppers B61D3/06) |
| Display label | Hopper cars (flat bottomed cars convertible into hoppers B61D3/06) |
| Total patents | 40 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 1 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 6 |
| 2024 | 1 |
| 2025 | 21 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Low-carbon granulated metallic units, and associated systems, devices, and methods
US-2026048434-A1 · Feb 19, 2026 · US
Use of residual iron within granulated metallic unit production facilities, and associated systems, devices, and methods
US-2026034581-A1 · Feb 5, 2026 · US
Continuous granulated metallic units production, and associated systems, devices, and methods
US-2026001124-A1 · Jan 1, 2026 · US
Use of a basic oxygen furnace to produce granulated metallic units, and associated systems, devices, and methods
US-2025353076-A1 · Nov 20, 2025 · US
Use of residual iron within granulated metallic unit production facilities, and associated systems, devices, and methods
US-12465973-B2 · Nov 11, 2025 · US
Partial closure plates for hopper cars
US-2025340226-A1 · Nov 6, 2025 · US
Continuous granulated metallic units production, and associated systems, devices, and methods
US-12427569-B2 · Sep 30, 2025 · US
Low-carbon granulated metallic units
US-12420335-B2 · Sep 23, 2025 · US
Use of a basic oxygen furnace to produce granulated metallic units, and associated systems, devices, and methods
US-12403529-B2 · Sep 2, 2025 · US
Low-sulfur granulated metallic units
US-12397346-B2 · Aug 26, 2025 · US
Treating cooling water in iron production facilities, and associated systems, devices, and methods
US-12370599-B2 · Jul 29, 2025 · US
Sensing method, system and assembly for railway assets
US-12371077-B2 · Jul 29, 2025 · US
Hopper railroad car having top hatch cover assembly
US-12286141-B2 · Apr 29, 2025 · US
Processing granulated metallic units within electric arc furnaces, and associated systems and methods
US-2025084496-A1 · Mar 13, 2025 · US
Torpedo cars for use with granulated metallic unit production, and associated systems, devices, and methods
US-2025083222-A1 · Mar 13, 2025 · US
Continuous granulated metallic units production, and associated systems, devices, and methods
US-2025083232-A1 · Mar 13, 2025 · US
Low-sulfur granulated metallic units, and associated systems, devices, and methods
US-2025083223-A1 · Mar 13, 2025 · US
Railcars for transporting granulated metallic units, and associated systems, devices, and methods
US-2025083713-A1 · Mar 13, 2025 · US
Use of a basic oxygen furnace to produce granulated metallic units, and associated systems, devices, and methods
US-2025083230-A1 · Mar 13, 2025 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B61D7/00?
- CPC B61D7/00 is the Cooperative Patent Classification code for “Hopper cars (flat bottomed cars convertible into hoppers B61D3/06).”
- How many patents are filed under CPC B61D7/00 (Hopper cars (flat bottomed cars convertible into hoppers B61D3/06))?
- Our database includes 40 publications tagged with this CPC code.
- Is patent activity under CPC B61D7/00 growing?
- Publication counts under this code: 1 in 2024 vs 21 in 2025 (latest complete years).