A21B 3/02
Doors
Official title: Doors; Flap gates
A21B3/02 (Doors) appears on 60 US grants and 67 published applications in this corpus.
Search patents in A21B- Granted patents
- 60
- Published applications
- 67
- Assignees
- 45
- Inventors
- 178
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 0 |
| 2004 | 2 | 1 |
| 2005 | 0 | 2 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 2 |
| 2010 | 0 | 2 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 4 |
| 2014 | 1 | 1 |
| 2015 | 5 | 4 |
| 2016 | 1 | 2 |
| 2017 | 2 | 0 |
| 2018 | 3 | 5 |
| 2019 | 6 | 9 |
| 2020 | 2 | 7 |
| 2021 | 7 | 9 |
| 2022 | 7 | 6 |
| 2023 | 3 | 1 |
| 2024 | 4 | 3 |
| 2025 | 6 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Oven17 Mar 2026US 12,575,576 B2
- Automatic oven21 Oct 2025US 12,449,133 B2Whirlpool Corporation
- Conveying device, pizza vending machine, and automatic pizza selling system1 Jul 2025US 12,347,261 B2
- Modular cooking appliance having a grease shield29 Apr 2025US 12,287,098 B2Automation Tech, LLC
- Glass coating composition, manufacturing method for coated glass using the glass coating composition, and cooking apparatus using the coated glass11 Mar 2025US 12,246,984 B2Kongju National University Industry-University Cooperation Foundation
Most cited
By later US patents
- Baking oven44US 4,964,392 AMiddleby Marshall Inc. · 1990
- Conveyorized oven with automated door41US 6,713,741 B2Maytag Corporation · 2004
- Food processing apparatus24US 5,732,614 ADelaware Capital Formation, Inc. · 1998
- Multipoise furnace cabinet24US 6,494,199 B1Carrier Corporation · 2002
- Rack oven20US 3,954,053 ATipe Revent AB · 1976