B65D 2581/3439
Means for affecting the heating or cooking properties
B65D2581/3439 (Means for affecting the heating or cooking properties) appears on 471 US grants and 264 published applications in this corpus.
Search patents in B65D- Granted patents
- 471
- Published applications
- 264
- Assignees
- 171
- Inventors
- 710
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 6 | 0 |
| 1989 | 27 | 0 |
| 1990 | 29 | 0 |
| 1991 | 21 | 0 |
| 1992 | 28 | 0 |
| 1993 | 32 | 0 |
| 1994 | 32 | 0 |
| 1995 | 16 | 0 |
| 1996 | 17 | 0 |
| 1997 | 9 | 0 |
| 1998 | 12 | 0 |
| 1999 | 13 | 0 |
| 2000 | 14 | 0 |
| 2001 | 10 | 3 |
| 2002 | 12 | 8 |
| 2003 | 9 | 10 |
| 2004 | 5 | 14 |
| 2005 | 6 | 16 |
| 2006 | 6 | 15 |
| 2007 | 2 | 23 |
| 2008 | 4 | 13 |
| 2009 | 4 | 27 |
| 2010 | 6 | 13 |
| 2011 | 11 | 15 |
| 2012 | 7 | 17 |
| 2013 | 13 | 10 |
| 2014 | 17 | 11 |
| 2015 | 11 | 5 |
| 2016 | 5 | 13 |
| 2017 | 10 | 6 |
| 2018 | 7 | 9 |
| 2019 | 8 | 6 |
| 2020 | 7 | 5 |
| 2021 | 8 | 6 |
| 2022 | 4 | 8 |
| 2023 | 1 | 2 |
| 2024 | 3 | 4 |
| 2025 | 2 | 1 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B65D 2581/344Geometry or shape factors influencing the microwave heating propertiesIndexing code233
- B65D 2581/3455Packages having means for improving the internal circulation of airIndexing code93
- B65D 2581/3447Heat attenuators, blocking agents or heat insulators for temperature controlIndexing code73
- B65D 2581/3459Means for holding the package at a distance from the microwave ovenIndexing code64
- B65D 2581/3448Binders for microwave reactive materialsIndexing code45
- B65D 2581/3452Packages having a plurality of microwave reactive layers, i.e. multiple or overlappingIndexing code37
- B65D 2581/3454Microwave reactive layer having a specified optical densityIndexing code31
- B65D 2581/3445Microwave reactive adhesivesIndexing code26
All 11 subgroupsShow fewer
Recent patents
- Pressure relief container for food to be heated and box having said container29 Sep 2026US 12,747,082 B2South Plastic Industry Co., Ltd.
- Blanks, constructs, and associated methods for induction heating of food products3 Feb 2026US 12,540,023 B2Graphic Packaging International, Inc.
- Adjustable tray1 Jul 2025US 12,344,445 B2Graphic Packaging International, Inc.
- Energy control elements for improved microwave heating of packaged articles20 May 2025US 12,309,905 B2915 Labs, LLC
- Food tray10 Sep 2024US 12,084,259 B2ConAgra Foods RDM, Inc.
- Microwave heatable film, microwave heatable package, and method for producing microwave heatable film8 Oct 2026US 2026/0307883 A1Ricoh Company, Ltd.
- Microwave heating film and method for manufacturing microwave heating film24 Sep 2026US 2026/0285576 A1
- Food container30 Jul 2026US 2026/0217411 A1
- Carton and Method of Using Same25 Jun 2026US 2026/0176015 A1Inno-Pak, LLC
- Food tray19 Jun 2025US 2025/0197084 A1ConAgra Foods RDM, Inc.
Most cited
By later US patents
- Microwave heating package and method297US 4,190,757 AThe Pillsbury Company · 1980
- Patterned metal foil laminate and method for making same274US 5,800,724 AFort James Corporation · 1998
- Insulating microwave interactive packaging250US 7,019,271 B2Graphic Packaging International, Inc. · 2006
- Microwave susceptor with separate attenuator for heat control217US 5,285,040 AGolden Valley Microwave Foods Inc. · 1994
- Abuse-tolerant metallic packaging materials for microwave cooking213US 6,204,492 B1Graphic Packaging Corporation · 2001