US5300747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite material for a microwave heating container and container formed therefrom
Assignee: PINNACLE FOODS BRANDS Corp
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Filing: 1991-09-20
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Granted: 1994-04-05
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Expires: 2011-09-20
Abstract
Abstract A composite material for efficient use in a microwave heating container and a container formed therefrom are described. The composite material includes a thermoplastic resin and a particulate dielectric material oriented therein so the container exhibits a dielectric constant within the range from about 5 to about 8 which is particularly useful for heating high moisture foods in microwave ovens. The particulate dielectric material includes particles having a dielectric constant within a range from about 5 to about 8 and a particle size within the range from about 1 (my)m to about 10 (my)m.
Inventors
- 👤 Frederick E. Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:04
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/647; H05B6/6491; H05B6/6494; B; B65; B65D; B65D81/00; B65D81/34; B65D81/3446; B65D2581/00; B65D2581/34; B65D2581/3437; B65D2581/3439; B65D2581/344; B65D2581/3443; B65D2581/3471; B65D2581/3472; B65D2581/3482; B65D2581/3485; B65D2581/3486; B65D2581/3494; Y; Y10; Y10S; Y10S99/00; Y10S99/14; Y10T; Y10T428/00; Y10T428/249921; Y10T428/25; Y10T428/256
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
83 words
A composite material for use in the construction of a microwave heating container, the composite material comprising a plastic resin and a particulate dielectric material oriented therein, said particulate dielectric material having a dielectric constant within a range of about 5 to about 8, a loss tangent value of less than 8×10 -4 , and a particle size of 1 μm to about 10 μm in a quantity sufficient to produce a dielectric constant of about 5 to about 8 for said composite.
Claim 2
Dependent Claim
83 words
A composite material for use in the construction of a microwave heating container, the composite material comprising a plastic resin and a particulate dielectric material oriented therein, said particulate dielectric material having a dielectric constant within a range of about 5 to about 8, a loss tangent value of less than 8×10 -4 , and a particle size of 1 μm to about 10 μm in a quantity sufficient to produce a dielectric constant of about 5 to about 8 for said composite.
Claim 3
Dependent Claim
15 words
The composite material according to claim 1 wherein the plastic resin comprises crystalline polyethylene terephthalate.
Claim 4
Dependent Claim
21 words
The composite material according to claim 1 wherein said particulate dielectric material comprises at least one of mica, alumina, and sapphire,
Claim 5
Dependent Claim
17 words
The composite material according to claim 3 wherein said particulate dielectric material consists essentially of muscovite mica.
Claim 6
Dependent Claim
21 words
The composite material according to claim 1 wherein said particulate dielectric material exhibits an aspect ratio of less than about 30.
Claim 7
Dependent Claim
19 words
The composite material according to claim 1 comprising up to about 40% by weight of said particulate dielectric material.
Claim 8
Dependent Claim
114 words
A microwave heating container exhibiting a shape having a contact area ratio of at least about 50% when containing liquids and being made of a composite material comprising a plastic resin and a particulate dielectric material oriented therein whereby said container exhibits a dielectric constant within the range from about 5 to about 8, said particulate dielectric material comprising particles having a dielectric constant within a range of about 5 to about 8, a loss tangent value of less than about 8×10 -4 , and a particle size of about 1 μm to about 10 μm in a quantity sufficient to produce a dielectric constant of about 5 to about 8 for said container.
Claim 9
Dependent Claim
114 words
A microwave heating container exhibiting a shape having a contact area ratio of at least about 50% when containing liquids and being made of a composite material comprising a plastic resin and a particulate dielectric material oriented therein whereby said container exhibits a dielectric constant within the range from about 5 to about 8, said particulate dielectric material comprising particles having a dielectric constant within a range of about 5 to about 8, a loss tangent value of less than about 8×10 -4 , and a particle size of about 1 μm to about 10 μm in a quantity sufficient to produce a dielectric constant of about 5 to about 8 for said container.
Claim 10
Dependent Claim
16 words
The microwave heating container according to claim 7 wherein the plastic resin comprises crystalline polyethylene terephthalate.
Claim 11
Dependent Claim
22 words
The microwave heating container according to claim 7 wherein the particulate dielectric material comprises at least one of mica, alumina, and sapphire.
Claim 12
Dependent Claim
16 words
The microwave heating container according to claim 9 wherein said particulate dielectric material comprises muscovite mica.
Claim 13
Dependent Claim
36 words
The microwave heating container according to claim 7 wherein said particulate dielectric material exhibits a widest surface and said widest surface is oriented to be substantially parallel to at least one wall surface of said container.
Claim 14
Dependent Claim
23 words
The microwave heating container according to claim 7 wherein the composite material comprises up to about 40% by weight of particulate dielectric material.
Claim 15
Dependent Claim
22 words
The microwave heating container according to claim 7 wherein said particulate dielectric material exhibits an aspect ratio of less than about 40.
Claim 16
Dependent Claim
17 words
The microwave heating container according to claim 13 wherein the aspect ratio is less than about 30.
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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) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-04 | 2001-10-04 | 2002-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-04 | 2005-10-04 | 2006-04-05 | $7700.00 | Window Closed / Lapsed |