E04D 3/35
Roofing slabs or stiff sheets comprising two or more layers
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)}
E04D3/35 (Roofing slabs or stiff sheets comprising two or more layers) appears on 368 US grants and 344 published applications in this corpus.
Search patents in E04D- Granted patents
- 368
- Published applications
- 344
- Assignees
- 189
- Inventors
- 627
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 11 | 0 |
| 1978 | 15 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 9 | 0 |
| 1982 | 5 | 0 |
| 1983 | 9 | 0 |
| 1984 | 10 | 0 |
| 1985 | 5 | 0 |
| 1986 | 9 | 0 |
| 1987 | 10 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 10 | 0 |
| 1991 | 6 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 4 |
| 2003 | 1 | 4 |
| 2004 | 3 | 9 |
| 2005 | 4 | 12 |
| 2006 | 1 | 8 |
| 2007 | 2 | 5 |
| 2008 | 3 | 15 |
| 2009 | 3 | 15 |
| 2010 | 14 | 18 |
| 2011 | 10 | 15 |
| 2012 | 12 | 12 |
| 2013 | 11 | 13 |
| 2014 | 16 | 23 |
| 2015 | 10 | 14 |
| 2016 | 12 | 15 |
| 2017 | 16 | 13 |
| 2018 | 11 | 22 |
| 2019 | 10 | 25 |
| 2020 | 17 | 14 |
| 2021 | 10 | 26 |
| 2022 | 10 | 15 |
| 2023 | 15 | 21 |
| 2024 | 19 | 9 |
| 2025 | 8 | 11 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Roof panels and related structures, and associated systems and methods7 Jul 2026US 12,674,323 B2Renovate Robotics, Inc.
- Integrated roof system with engineered wood9 Jun 2026US 12,650,018 B2Louisiana-Pacific Corp.
- Wall building system10 Mar 2026US 12,571,211 B1
- Structural insulated sheathing panel and methods of use and manufacture thereof27 Jan 2026US 12,534,912 B2Huber Engineered Woods LLC
- Vented insulated roof sheathing13 Jan 2026US 12,523,039 B2Louisiana-Pacific Corp.
- Sandwich panel and building envelope thereof27 Aug 2026US 2026/0250955 A1
- Ventilated structural panels and method of construction with ventilated structural panels6 Aug 2026US 2026/0226740 A1
- Roof panel and building provided with said roof panel6 Aug 2026US 2026/0226745 A1Sekisui House, Ltd.
- Roofs and roof assemblies including porous cores and continuous fiber skins18 Jun 2026US 2026/0168249 A1Hanwha Azdel, Inc.
- Roof panels and related structures, and associated systems and methods29 Jan 2026US 2026/0028821 A1Renovate Robotics, Inc.
Most cited
By later US patents
- Tongue-groove connection326US 4,100,710 AHoesch Werke Aktiengesellschaft · 1978
- Roof panel joint242US 4,196,554 AH. H. Robertson Company · 1980
- Constructional panels208US 5,050,362 APolygal · 1991
- Modular building construction and components thereof166US 6,256,960 B12001
- Insulating vinyl siding108US 4,034,528 AAegean Industries, Inc. · 1977