Liquid absorber
US-2020398575-A1 · Dec 24, 2020 · US
Closed waste ink collectors
Closed waste ink collectors · 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 | B41J2/1728 |
| Official title | {Closed waste ink collectors} |
| Display label | Closed waste ink collectors |
| Total patents | 176 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 10 |
| 2016 | 9 |
| 2017 | 9 |
| 2018 | 9 |
| 2019 | 10 |
| 2020 | 14 |
| 2021 | 33 |
| 2022 | 23 |
| 2023 | 14 |
| 2024 | 20 |
| 2025 | 20 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Liquid absorber, ink absorbing device, and liquid droplet ejection apparatus
US-10870281-B2 · Dec 22, 2020 · US
Waste fluid quantity measuring device and printer equipped therewith
US-2020361211-A1 · Nov 19, 2020 · US
Liquid collection device with suctioner for sucking liquid
US-10821733-B2 · Nov 3, 2020 · US
Liquid absorber, liquid absorbing unit, and liquid ejection apparatus
US-2020298572-A1 · Sep 24, 2020 · US
Liquid ejecting apparatus
US-2020290381-A1 · Sep 17, 2020 · US
Liquid agent mist recovery device
US-2020262206-A1 · Aug 20, 2020 · US
Liquid absorber, ink absorbing device, and liquid droplet ejection apparatus
US-2020230964-A1 · Jul 23, 2020 · US
Inkjet printing apparatus and determining method
US-2020108616-A1 · Apr 9, 2020 · US
Waste liquid collector and liquid discharge apparatus
US-2020101745-A1 · Apr 2, 2020 · US
Waste liquid container and attachment
US-2020086649-A1 · Mar 19, 2020 · US
Inkjet printing apparatus and ink filling method for the same
US-10569560-B2 · Feb 25, 2020 · US
Liquid collection device with suctioner for sucking liquid
US-2020016897-A1 · Jan 16, 2020 · US
Waste ink conveying device and image forming apparatus
US-2019375212-A1 · Dec 12, 2019 · US
Waste liquid container and liquid ejecting apparatus
US-10479092-B2 · Nov 19, 2019 · US
Inkjet printing apparatus and detecting method
US-10427410-B2 · Oct 1, 2019 · US
Inkjet printer
US-2019240982-A1 · Aug 8, 2019 · US
Printer and waste pack for use in printer
US-10357972-B2 · Jul 23, 2019 · US
Waste liquid container and attachment
US-10338517-B2 · Jul 2, 2019 · US
Inkjet printer with ink receptor for receiving ink as waste liquid
US-10328704-B2 · Jun 25, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B41J2/1728?
- CPC B41J2/1728 is the Cooperative Patent Classification code for “Closed waste ink collectors.”
- How many patents are filed under CPC B41J2/1728 (Closed waste ink collectors)?
- Our database includes 176 publications tagged with this CPC code.
- Is patent activity under CPC B41J2/1728 growing?
- Publication counts under this code: 20 in 2024 vs 20 in 2025 (latest complete years).