Door Assembly for Railcars
US-2022371630-A1 · Nov 24, 2022 · US
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both sliding and plugging, (e.g. for refrigerator cars)
both sliding and plugging, (e.g. for refrigerator cars) · 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 | B61D19/009 |
| Official title | {both sliding and plugging, (e.g. for refrigerator cars)} |
| Display label | both sliding and plugging, (e.g. for refrigerator cars) |
| 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 | 5 |
| 2016 | 5 |
| 2017 | 6 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 2 |
| 2022 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rapid discharge door locking system
US-10773735-B2 · Sep 15, 2020 · US
Plug door opening-closing device
US-10589758-B2 · Mar 17, 2020 · US
Plug door device
US-10458166-B2 · Oct 29, 2019 · US
Plug door opening-closing device and plug door device
US-10328955-B2 · Jun 25, 2019 · US
Rapid discharge door locking system
US-2019016349-A1 · Jan 17, 2019 · US
Plug door opening-closing device and plug door device
US-2018170405-A1 · Jun 21, 2018 · US
Sliding-plug movement mechanism device based on virtual linear movement guide rail and for sliding-plug door
US-9796397-B2 · Oct 24, 2017 · US
Plug door device
US-9797171-B2 · Oct 24, 2017 · US
Railway vehicle plug door device and railway vehicle plug door
US-9789884-B2 · Oct 17, 2017 · US
Plug door device
US-2017284139-A1 · Oct 5, 2017 · US
Railroad vehicle and plug door for railroad vehicle
US-9663119-B2 · May 30, 2017 · US
Sliding-plug movement mechanism device based on virtual linear movement guide rail and for sliding-plug door
US-2017137037-A1 · May 18, 2017 · US
Plug door device
US-2016305169-A1 · Oct 20, 2016 · US
Plug door device
US-9403422-B2 · Aug 2, 2016 · US
Railroad vehicle and plug door for railroad vehicle
US-9403540-B2 · Aug 2, 2016 · US
Door opening and closing apparatus
US-9316030-B2 · Apr 19, 2016 · US
Plug door opening-closing device and plug door device
US-2016082983-A1 · Mar 24, 2016 · US
Railroad vehicle and plug door for railroad vehicle
US-2015321677-A1 · Nov 12, 2015 · US
Railroad vehicle and plug door for railroad vehicle
US-2015298710-A1 · Oct 22, 2015 · US