B65D 2581/3471
Microwave reactive substances present in the packaging material
B65D2581/3471 (Microwave reactive substances present in the packaging material) appears on 460 US grants and 254 published applications in this corpus.
Search patents in B65D- Granted patents
- 460
- Published applications
- 254
- Assignees
- 162
- Inventors
- 690
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 10 | 0 |
| 1988 | 4 | 0 |
| 1989 | 29 | 0 |
| 1990 | 38 | 0 |
| 1991 | 26 | 0 |
| 1992 | 31 | 0 |
| 1993 | 35 | 0 |
| 1994 | 29 | 0 |
| 1995 | 12 | 0 |
| 1996 | 13 | 0 |
| 1997 | 9 | 0 |
| 1998 | 12 | 0 |
| 1999 | 9 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 2 |
| 2002 | 10 | 5 |
| 2003 | 3 | 13 |
| 2004 | 10 | 14 |
| 2005 | 5 | 8 |
| 2006 | 8 | 16 |
| 2007 | 1 | 24 |
| 2008 | 5 | 20 |
| 2009 | 8 | 22 |
| 2010 | 2 | 19 |
| 2011 | 14 | 9 |
| 2012 | 10 | 18 |
| 2013 | 9 | 8 |
| 2014 | 13 | 12 |
| 2015 | 11 | 6 |
| 2016 | 5 | 6 |
| 2017 | 7 | 8 |
| 2018 | 6 | 9 |
| 2019 | 5 | 2 |
| 2020 | 4 | 6 |
| 2021 | 4 | 6 |
| 2022 | 6 | 6 |
| 2023 | 4 | 7 |
| 2024 | 3 | 2 |
| 2025 | 8 | 3 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B65D 2581/3472Aluminium or compounds thereofIndexing code376
- B65D 2581/3479Other metallic compoundsIndexing code182
- B65D 2581/3477Iron or compounds thereofIndexing code167
- B65D 2581/3483Carbon, carbon black, or graphiteIndexing code72
- B65D 2581/3474Titanium or compounds thereofIndexing code50
- B65D 2581/3481Silicon or oxides thereofIndexing code34
- B65D 2581/3485Other unusual non-metallic substancesIndexing code22
- B65D 2581/3482Ceramic compositionsIndexing code21
Recent patents
- Container with liner8 Sep 2026US 12,729,035 B2Graphic Packaging International, Inc.
- Blanks, constructs, and associated methods for induction heating of food products3 Feb 2026US 12,540,023 B2Graphic Packaging International, Inc.
- Packaging bag27 Jan 2026US 12,534,280 B2Kyoraku Co., Ltd.
- Susceptor ink compositions for microwaveable packages14 Oct 2025US 12,441,903 B2Instituto TecnolóGico Del Embalaje, Transporte Y LogíStica (Itene)
- Container with liner19 Aug 2025US 12,391,456 B2Graphic Packaging International, Inc.
- Microwave heatable film, microwave heatable package, and method for producing microwave heatable film8 Oct 2026US 2026/0307883 A1Ricoh Company, Ltd.
- Tray with compartments21 May 2026US 2026/0138807 A1Graphic Packaging International, Inc.
- Formulation For Treatment of Middle Ear Infections Without Antibiotics7 May 2026US 2026/0124265 A1
- Container With Liner20 Mar 2025US 2025/0091757 A1Graphic Packaging International, Inc.
- Microwavable packages and food products20 Mar 2025US 2025/0091790 A1Kraft Foods Group Brands LLC
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
- Packaged food item and method for achieving microwave browning thereof228US 4,267,420 AGeneral Mills, Inc. · 1981
- Microwave susceptor with separate attenuator for heat control217US 5,285,040 AGolden Valley Microwave Foods Inc. · 1994