E04F 21/12
Acting by gas pressure
Official title: acting by gas pressure, e.g. steam pressure
E04F21/12 (Acting by gas pressure) appears on 180 US grants and 140 published applications in this corpus.
Search patents in E04F- Granted patents
- 180
- Published applications
- 140
- Assignees
- 69
- Inventors
- 229
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 8 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 1 |
| 2003 | 6 | 5 |
| 2004 | 5 | 8 |
| 2005 | 1 | 4 |
| 2006 | 5 | 12 |
| 2007 | 6 | 5 |
| 2008 | 1 | 4 |
| 2009 | 6 | 7 |
| 2010 | 8 | 2 |
| 2011 | 5 | 8 |
| 2012 | 5 | 6 |
| 2013 | 7 | 7 |
| 2014 | 8 | 10 |
| 2015 | 5 | 4 |
| 2016 | 3 | 4 |
| 2017 | 6 | 4 |
| 2018 | 3 | 11 |
| 2019 | 4 | 4 |
| 2020 | 9 | 5 |
| 2021 | 4 | 3 |
| 2022 | 5 | 4 |
| 2023 | 3 | 9 |
| 2024 | 4 | 5 |
| 2025 | 9 | 5 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Automated wall finishing system and method25 Aug 2026US 12,716,247 B2JLG Industries, Inc.
- Gunite feed system9 Jun 2026US 12,649,259 B2
- Pipe of a blowing machine9 Dec 2025US 12,491,525 B2Saint-Gobain Isover
- Gunite feed wheel21 Oct 2025US 12,447,647 B2
- Device for preparing an insulation product made from wool, in particular mineral wool14 Oct 2025US 12,442,201 B2Saint-Gobain Isover
- Automated wall finishing system and method1 Oct 2026US 2026/0297963 A1JLG Industries, Inc.
- Tool for installing insulation16 Apr 2026US 2026/0103901 A1CertainTeed Corporation
- Suspended-type smart painting apparatus for building wall surface19 Feb 2026US 2026/0048411 A1
- Automated drywall painting system and method23 Oct 2025US 2025/0327317 A1Canvas Construction, Inc.
- Device for preparing an insulating product based on wool, in particular mineral wool14 Aug 2025US 2025/0257507 A1Saint-Gobain Isover
Most cited
By later US patents
- Purgeable dispensing gun for polyurethane foam and the like137US 4,117,551 A1978
- Pressure operated spray applicator97US 4,961,537 ADJS&T Limited Partnership · 1990
- Manually adjustable spray applicator84US 5,188,295 ADJS&T Limited Partnership · 1993
- Manually adjustable spray applicator82US 4,955,545 ADJS&T Limited Partnership · 1990
- Manually adjustable spray applicator82US 5,069,390 ADJ S & T Limited Partnership · 1991