Hopper Car Discharge Gate Seal Assembly
US-2026062036-A1 · Mar 5, 2026 · US
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Sealing means thereof
Sealing means thereof · 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 | B61D7/22 |
| Official title | Sealing means thereof |
| Display label | Sealing means thereof |
| Total patents | 12 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2016 | 2 |
| 2019 | 1 |
| 2020 | 1 |
| 2022 | 2 |
| 2023 | 2 |
| 2025 | 2 |
| 2026 | 2 |
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-2026015017-A1 · Jan 15, 2026 · US
Hopper car discharge gate seal assembly
US-12472994-B2 · Nov 18, 2025 · US
Hopper car outlet gate mechanical flap to prevent pellet loss
US-12459547-B2 · Nov 4, 2025 · 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
Hopper car discharge gate seal assembly
US-2022371629-A1 · Nov 24, 2022 · US
Hopper Car Outlet Gate Mechanical Flap to Prevent Pellet Loss
US-2022315064-A1 · Oct 6, 2022 · US
Railroad hopper car with flow through structure
US-2020353954-A1 · Nov 12, 2020 · US
Rail road hopper car
US-10214224-B2 · Feb 26, 2019 · US
Rail road hopper car ridge fittings
US-2016137210-A1 · May 19, 2016 · US
Rail road hopper car ridge fittings
US-9272717-B2 · Mar 1, 2016 · US