Hopper car outlet gate mechanical flap to prevent pellet loss
US-2026015017-A1 · Jan 15, 2026 · US
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pivoted
pivoted · 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 | B61D7/18 |
| Official title | pivoted |
| Display label | pivoted |
| Total patents | 23 |
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 | 2 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 6 |
| 2022 | 1 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hopper car outlet gate mechanical flap to prevent pellet loss
US-12459547-B2 · Nov 4, 2025 · US
Railroad car and end door assembly therefor
US-12139178-B2 · Nov 12, 2024 · US
Railroad hopper car with flow through structure
US-2023399033-A1 · Dec 14, 2023 · US
Railroad hopper car with flow through structure
US-11691652-B2 · Jul 4, 2023 · US
Capstan-driven air pump system for opening and closing a longitudinal railcar door
US-11649744-B2 · May 16, 2023 · US
Hopper Car Outlet Gate Mechanical Flap to Prevent Pellet Loss
US-2022315064-A1 · Oct 6, 2022 · US
Remotely operated railcar hatches
US-10858016-B2 · Dec 8, 2020 · US
Railroad car and end door assembly therefor
US-2020377130-A1 · Dec 3, 2020 · US
Railroad hopper car with flow through structure
US-2020353954-A1 · Nov 12, 2020 · US
Railroad car and end door assembly therefor
US-10766505-B2 · Sep 8, 2020 · US
Railroad hopper car body fittings
US-2020240193-A1 · Jul 30, 2020 · US
Railroad hopper car body fittings
US-10648217-B2 · May 12, 2020 · US
Remotely operated railcar hatches
US-2019126946-A1 · May 2, 2019 · US
Non-horizontal discharge gates
US-2019061788-A1 · Feb 28, 2019 · US
Longitudinal gate hopper car without partitions
US-2019001997-A1 · Jan 3, 2019 · US
Railroad hopper car body fittings
US-2018305967-A1 · Oct 25, 2018 · US
Railroad hopper car and door mechanism therefor
US-10023206-B2 · Jul 17, 2018 · US
Railroad car and end door assembly therefor
US-2018194373-A1 · Jul 12, 2018 · US
Hopper car discharge structure
US-9834230-B2 · Dec 5, 2017 · US