Method for building a traffic tunnel, a conduit shaft, or a pressurised water shaft by way of the tubbing construction method
US-2025305415-A1 · Oct 2, 2025 · US
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Waste materials; Refuse
Waste materials; Refuse · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C04B18/04 |
| Official title | Waste materials; Refuse |
| Display label | Waste materials; Refuse |
| Total patents | 20 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 1 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 3 |
| 2021 | 2 |
| 2022 | 1 |
| 2023 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
High performance glossy finish green hybrid composites with variable density and an improved process for making thereof
US-12227458-B2 · Feb 18, 2025 · US
Method of producing a supplementary cementitious material
US-2023406774-A1 · Dec 21, 2023 · US
Methods for manufacturing geopolymer concrete using recycled wind turbine rotor blades
US-2023057162-A1 · Feb 23, 2023 · US
Modified sulfur, method for preparing same, apparatus for preparing same, and use thereof
US-11434134-B2 · Sep 6, 2022 · US
Modified sulfur, method for preparing same, apparatus for preparing same, and use thereof
US-10994995-B2 · May 4, 2021 · US
High performance glossy finish green hybrid composites with variable density and an improved process for making thereof
US-2021053875-A1 · Feb 25, 2021 · US
Modified sulfur, method for preparing same, apparatus for preparing same, and use thereof
US-2019185321-A1 · Jun 20, 2019 · US
Modified sulfur, method for preparing same, apparatus for preparing same, and use thereof
US-2019185322-A1 · Jun 20, 2019 · US
Modified sulfur, method for preparing same, apparatus for preparing same, and use thereof
US-10179736-B2 · Jan 15, 2019 · US
Method of constructing an axial compression steel tubular column
US-10087106-B2 · Oct 2, 2018 · US
Ultra-high performance glass concrete and method for producing same
US-9856171-B2 · Jan 2, 2018 · US
Production method for biomedical and industrial material using ceramic derived from birds' beaks
US-9855365-B2 · Jan 2, 2018 · US
Axial compression steel tubular column with internal local restraint and filled with high strengthen compound concrete containing normal-strength demolished concrete lumps and construction process of such column
US-2017253526-A1 · Sep 7, 2017 · US
Method for reducing hexavalent chromium in oxidic solids
US-9725364-B2 · Aug 8, 2017 · US
Modified sulfur, method for preparing same, apparatus for preparing same, and use thereof
US-2016137500-A1 · May 19, 2016 · US
Stabilized sulfur binding using activated fillers
US-9085488-B2 · Jul 21, 2015 · US
Production method for biomedical and industrial material using ceramic derived from birds' beaks
US-2015165090-A1 · Jun 18, 2015 · US
Method for reducing hexavalent chromium in oxidic solids
US-2015166411-A1 · Jun 18, 2015 · US
Robust polycarboxylate containing ether linkages for milling preparation of cementitious materials
US-8993656-B2 · Mar 31, 2015 · US