US4865854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave food package
Assignee: 3M Co
•
Filing: 1987-08-11
•
Granted: 1989-09-12
•
Expires: 2007-08-11
Abstract
Abstract A package of food containing a substantial amount of water and solidified grease that can be cooked within the package in a microwave oven. A pad adjacent the food comprises microwave radiation transparent generally hydrophobic liquid grease adsorbing materials that are capable of holding the amount of grease in the food when it is melted; and a vapor tight microwave radiation transparent enclosure surrounding the pad and food includes means for venting stream from the enclosure as the food is cooked.
Inventors
- 👤 Curtis L. Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:39
CPC Classifications
B; B65; B65D; B65D77/00; B65D77/22; B65D77/225; A; A23; A23B; A23B2/00; A23B2/05; A23B2/08; A23B2/30; A23B2/33; B65D81/00; B65D81/24; B65D81/26; B65D81/264; B65D81/34; B65D81/3446; B65D81/3461; B65D2205/00; B65D2581/00; B65D2581/34; B65D2581/3401; B65D2581/3402; B65D2581/3416; B65D2581/3417; B65D75/00; B65D75/52; B65D75/58; B65D75/5855
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A package for use in a microwave oven, said package comprising: food to be cooked by microwave energy containing a substantial amount of water and solidified grease; a pad adjacent said food comprising generally microwave radiation transparent and generally hydrophobic grease adsorbing materials capable of holding the amount of grease in said food when it is melted by cooking said food; and a vapor tight microwave radiation transparent enclosure surrounding the pad and food.
Claim 2
Dependent Claim
74 words
A package for use in a microwave oven, said package comprising: food to be cooked by microwave energy containing a substantial amount of water and solidified grease; a pad adjacent said food comprising generally microwave radiation transparent and generally hydrophobic grease adsorbing materials capable of holding the amount of grease in said food when it is melted by cooking said food; and a vapor tight microwave radiation transparent enclosure surrounding the pad and food.
Claim 3
Dependent Claim
25 words
A package according to claim 1 further including means for venting said enclosure to afford cooking the food within the enclosure in a microwave oven.
Claim 4
Dependent Claim
56 words
A package according to claim 2 wherein said enclosure comprises heat softenable polymeric film and said means for venting comprises a layer of microwave radiation absorbing material adhered to said polymeric film, said polymeric film being softenable by heating of said layer to allow rupturing of said enclosure during cooking of the food by microwave energy.
Claim 5
Dependent Claim
23 words
A package according to claim 1 wherein said pad comprises blown microfibers of polymers selected from the group consisting of polyolefin and polyester.
Claim 6
Dependent Claim
23 words
A package according to claim 1 further including means for affording easy manual opening of said enclosure to facilitate removal of said food.
Claim 7
Dependent Claim
56 words
A package according to claim 1 wherein said enclosure comprises face to face layers of polymeric film having distal edges defining one edge of said package, and a vapor tight seal between said layers at a position spaced from said edge and adapted to be manually opened by manually pulling apart said layers adjacent said edge.
Claim 8
Dependent Claim
101 words
A package according to claim 1 wherein said enclosure comprises face to face layers of material having distal edges defining one edge of said package, a vapor tight seal between said layers at a position spaced from said edge, and a layer of microwave radiation absorbing material adhered to one of said layers of film along said seal, said seal being softenable by heating of said layer to allow rupturing of said seal during cooking of the food by a microwave energy and being adapted to be manually opened after such cooking by manually pulling apart said layers adjacent said edge.
Claim 9
Dependent Claim
121 words
A package according to claim 1 wherein said enclosure comprises heat softenable polymeric film and has a side edge defined by said polymeric film, said means for venting comprises an elongate layer of microwave radiation absorbable material adhered to said polymeric film generally parallel to and closely spaced from said first side edge, and said polymeric film includes a projecting flap generally parallel to and spaced from the side of said elongate layer opposite said side edge, said flap and side edge being adapted to be manually peeled apart to separate said package along the radiation absorbing material after the film has been weakened and perforated by heating of said radiation absorbing material during exposure of the package to microwave energy.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |