E21D 11/38
Waterproofing
Official title: Waterproofing (in general E02D31/00); Heat insulating; Soundproofing; Electric insulating (for building constructions in general E04B1/62)
E21D11/38 (Waterproofing) appears on 173 US grants and 139 published applications in this corpus.
Search patents in E21D- Granted patents
- 173
- Published applications
- 139
- Assignees
- 128
- Inventors
- 421
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 5 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 0 |
| 2002 | 2 | 2 |
| 2003 | 3 | 6 |
| 2004 | 3 | 1 |
| 2005 | 3 | 2 |
| 2006 | 0 | 2 |
| 2007 | 0 | 7 |
| 2008 | 2 | 2 |
| 2009 | 3 | 6 |
| 2010 | 1 | 1 |
| 2011 | 2 | 3 |
| 2012 | 2 | 5 |
| 2013 | 1 | 5 |
| 2014 | 2 | 7 |
| 2015 | 2 | 8 |
| 2016 | 7 | 11 |
| 2017 | 4 | 7 |
| 2018 | 8 | 5 |
| 2019 | 10 | 14 |
| 2020 | 8 | 14 |
| 2021 | 12 | 9 |
| 2022 | 7 | 8 |
| 2023 | 6 | 6 |
| 2024 | 10 | 3 |
| 2025 | 4 | 4 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Groove-type skeleton, sealed lining structure, underground gas storage and construction method11 Aug 2026US 12,704,067 B2Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
- Methods and formulations for sealing structural leaks3 Mar 2026US 12,565,782 B2GDWS Pty. Ltd.
- Spray-applied polyurethane insulation material for tunnels in cold regions, its application, and its construction method27 Jan 2026US 12,534,629 B2China Academy of Railway Sciences Corporation Limited
- Structure protection sheet, concrete block, and method for manufacturing reinforced structure29 Jul 2025US 12,371,378 B2Keiwa Inc.
- Fire-prevention and extinguishing material for plugging air leakage in underground barrier pillar of coal mine and use method thereof10 Jun 2025US 12,326,087 B1China University of Mining and Technology
- Post-mining water-resisting layer reconstruction method and related device23 Jul 2026US 2026/0210248 A1China University of Mining and Technology, Beijing
- Structure Protection Sheet, Concrete Block, and Method for Manufacturing Reinforced Structure30 Oct 2025US 2025/0333360 A1Keiwa Inc.
- Grout free expandable standpipe28 Aug 2025US 2025/0270781 A1Inflatable Packers International LLC
- Spray-applied polyurethane insulation material for tunnels in cold regions, its application, and its construction method29 May 2025US 2025/0171646 A1China Academy of Railway Sciences Corporation Limited
- Groove-type skeleton, sealed lining structure, underground gas storage and construction method20 Mar 2025US 2025/0092786 A1Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
Most cited
By later US patents
- Water cutoff junction member for concrete products to be joined together198US 6,052,960 AYamax Corporation · 2000
- Method of lining a pipe194US 4,009,063 AInsituform (Pipes & Structures) Ltd. · 1977
- Precompressed water and/or fire resistant tunnel expansion joint systems, and transitions64US 9,631,362 B2Emseal Joint Systems Ltd. · 2017
- Process for making silicon carbide reinforced silicon carbide composite57US 5,840,221 ASaint-Gobain/Norton Industrial Ceramics Corporation · 1998
- Device for keeping a lining-layer in contact with the walls of a civil-engineering works45US 4,379,654 AIndustrie Pirelli S.p.A. · 1983