Curved photovoltaic module and photovoltaic building surface
US-2025324773-A1 · Oct 16, 2025 · US
Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation {(self-supporting roofing slabs laminated with layers of insulating material E04B7/22; insulating devices or arrangements in the roof covering E04D13/16; connecting, fastening of double roof covering E04D3/3608)}
Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation {(self-supporting roofing slabs laminated with layers of insulating material E04B7/22; insulating devices or arrangements in the roof covering E04D13/16; connecting, fastening of double roof covering E04D3/3608)} · Cooperative Patent Classification (CPC)
Building, mining, and civil engineering structures.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | E04D3/35 |
| Official title | Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation {(self-supporting roofing slabs laminated with layers of insulating material E04B7/22; insulating devices or arrangements in the roof covering E04D13/16; connecting, fastening of double roof covering E04D3/3608)} |
| Display label | Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation {(self-supporting roofing slabs laminated with layers of insulating material E04B7/22; insulating devices or arrangements in the roof covering E04D13/16; connecting, fastening of double roof covering E04D3/3608)} |
| Total patents | 33 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 3 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 2 |
| 2021 | 4 |
| 2022 | 4 |
| 2023 | 8 |
| 2024 | 5 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Panel
US-2025003216-A1 · Jan 2, 2025 · US
Integrated roof system with engineered wood
US-12180714-B2 · Dec 31, 2024 · US
Extruded polystyrene boardstock and roof structure containing the extruded polystyrene boardstock
US-12168338-B2 · Dec 17, 2024 · US
Panel
US-12104376-B2 · Oct 1, 2024 · US
Metal roofing system
US-11987985-B2 · May 21, 2024 · US
Panelized roofing system
US-11927019-B2 · Mar 12, 2024 · US
Expanded polystyrene boardstock and roof structure containing the expanded polystyrene boardstock
US-2023405979-A1 · Dec 21, 2023 · US
Integrated roof system with engineered wood
US-2023313533-A1 · Oct 5, 2023 · US
Panel
US-2023250638-A1 · Aug 10, 2023 · US
Panel
US-11702838-B2 · Jul 18, 2023 · US
Panelized roofing system
US-2023220673-A1 · Jul 13, 2023 · US
Panelized roofing system
US-11608640-B2 · Mar 21, 2023 · US
Integrated roof system with integrated driplap edge
US-2023010965-A1 · Jan 12, 2023 · US
Roofing panels with integrated watershedding
US-2023003028-A1 · Jan 5, 2023 · US
Integrated roof system with embossed silicone roof planks
US-2022389716-A1 · Dec 8, 2022 · US
Panelized roofing system
US-2022381032-A1 · Dec 1, 2022 · US
Metal roofing system
US-2022333383-A1 · Oct 20, 2022 · US
Protective packaging membranes as integrated layer in building system components
US-11407209-B2 · Aug 9, 2022 · US
Protective packaging membranes as integrated layer in building system components
US-2021379876-A1 · Dec 9, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC E04D3/35?
- CPC E04D3/35 is the Cooperative Patent Classification code for “Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation {(self-supporting roofing slabs laminated with layers of insulating material E04B7/22; insulating devices or arrangements in the roof covering E04D13/16; connecting, fastening of double roof covering E04D3/3608)}.”
- How many patents are filed under CPC E04D3/35 (Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation {(self-supporting roofing slabs laminated with layers of insulating material E04B7/22; insulating devices or arrangements in the roof covering E04D13/16; connecting, fastening of double roof covering E04D3/3608)})?
- Our database includes 33 publications tagged with this CPC code.
- Is patent activity under CPC E04D3/35 growing?
- Publication counts under this code: 5 in 2024 vs 2 in 2025 (latest complete years).