US5023134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene-coated microwaveable waxed paper
Assignee: Fort James Corp
•
Filing: 1989-09-07
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Granted: 1991-06-11
•
Expires: 2009-09-07
Abstract
Abstract A wrapping material comprising a paper-based substrate and a coating comprising a polypropylene-based wax having a molecular weight between approximately 1000 to 3000 provided on the substrate for heating and storage of articles of consumption.
Inventors
- 👤 Thomas Bezigian
- 👤 George T. Nebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:35
CPC Classifications
B; B65; B65D; B65D65/00; B65D65/38; B65D65/42; Y; Y10; Y10S; Y10S106/00; Y10S106/901; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31808; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
37 words
A wrapping paper for use in heating and packaging articles of consumption comprising a paper-based substrate and a coating comprised of a polypropylene wax having a molecular weight between approximately 1500 to 3000 provided on said substrate.
Claim 2
Dependent Claim
37 words
A wrapping paper for use in heating and packaging articles of consumption comprising a paper-based substrate and a coating comprised of a polypropylene wax having a molecular weight between approximately 1500 to 3000 provided on said substrate.
Claim 3
Dependent Claim
19 words
The wrapping paper as claimed in claim 1, wherein said coating is provided on one side of said substrate.
Claim 4
Dependent Claim
19 words
The wrapping paper as claimed in claim 1, wherein said coating is provided on both sides of said substrate.
Claim 5
Dependent Claim
21 words
The wrapping paper as claimed in claim 1, wherein said coating has a thickness between about 0.3 mil and 1.5 mil.
Claim 6
Dependent Claim
19 words
The wrapping paper as claimed in claim 1, wherein the molecular weight of said polypropylene wax is approximately 2000.
Claim 7
Dependent Claim
31 words
The wrapping paper as claimed in claim 1, wherein said polypropylene wax coating is provided on said substrate by coating said polypropylene wax at a temperature range between approximately 325°-500° F.
Claim 8
Dependent Claim
19 words
The wrapping paper as claimed in claim 1, wherein said paper-based substrate is a bleached kraft of 10-30 lb./ream.
Claim 9
Dependent Claim
29 words
The wrapping paper as claimed in claim 1, wherein said coating further comprises at least one additive for modifying the coefficient of friction on the surface of said coating.
Claim 10
Dependent Claim
33 words
The wrapping paper as claimed in claim 8, wherein said additive is selected from the group consisting of fatty amides, polyethylene having a molecular weight between approximately 1,000 to 12,000, and diatomaceous earth.
Claim 11
Dependent Claim
19 words
The wrapping paper as claimed in claim 8, wherein said coating is provided on one side of said substrate.
Claim 12
Dependent Claim
19 words
The wrapping paper as claimed in claim 8, wherein said coating is provided on both sides of said substrate.
Claim 13
Dependent Claim
19 words
The wrapping paper as claimed in claim 8, wherein said molecular weight of said polypropylene wax is approximately 2000.
Claim 14
Dependent Claim
25 words
The wrapping paper as claimed in claim 1, wherein said coating further comprises at least one additive for modifying the heat sealability of said coating.
Claim 15
Dependent Claim
15 words
The wrapping paper as claimed in claim 13, wherein said additive is ethylene-vinyl acetate copolymer.
Claim 16
Dependent Claim
23 words
The wrapping paper as claimed in claim 14, wherein the molecular weight of said ethylene-vinyl acetate copolymer is between about 1,000 to 12,000.
Claim 17
Dependent Claim
19 words
The wrapping paper as claimed in claim 13, wherein said coating is provided on one side of said substrate.
Claim 18
Dependent Claim
19 words
The wrapping paper as claimed in claim 13, wherein said coating is provided on both sides of said substrate.
Claim 19
Dependent Claim
19 words
The wrapping paper as claimed in claim 13, wherein said molecular weight of said polypropylene wax is approximately 2000.
Claim 20
Dependent Claim
63 words
A process for heating an article of consumption comprising: A. covering at least a portion of the surface of the article of consumption with a wrapping material comprising a paper-based substrate and a coating comprised of a polypropylene wax having a molecular weight between approximately 1500 to 3000 provided on the substrate; and B. subjecting said covered article of consumption to microwave energy.
Claim 21
Dependent Claim
63 words
A process for heating an article of consumption comprising: A. covering at least a portion of the surface of the article of consumption with a wrapping material comprising a paper-based substrate and a coating comprised of a polypropylene wax having a molecular weight between approximately 1500 to 3000 provided on the substrate; and B. subjecting said covered article of consumption to microwave energy.
Claim 22
Dependent Claim
18 words
The process as claimed in claim 19, wherein said coating is provided on one side of said substrate.
Claim 23
Dependent Claim
18 words
The process as claimed in claim 19, wherein said coating is provided on both sides of said substrate.
Claim 24
Dependent Claim
20 words
The process as claimed in claim 19, wherein said coating has a thickness between about 0.3 mil and 1.5 mil.
Claim 25
Dependent Claim
18 words
The process as claimed in claim 19, wherein the molecular weight of said polypropylene wax is approximately 2000.
Claim 26
Dependent Claim
30 words
The process as claimed in claim 19, wherein said polypropylene wax coating is provided on said substrate by coating said polypropylene wax at a temperature range between approximately 325°-500° F.
Claim 27
Dependent Claim
18 words
The process as claimed in claim 19, wherein said paper-based substrate is a bleached kraft of 10-30 lb./ream.
Claim 28
Dependent Claim
28 words
The process as claimed in claim 19, wherein said coating further comprises at least one additive for modifying the coefficient of friction on the surface of said coating.
Claim 29
Dependent Claim
32 words
The process as claimed in claim 19, wherein said additive is selected from the group consisting of fatty amides, polyethylene having a molecular weight between approximately 1,000 to 12,000, and diatomaceous earth.
Claim 30
Dependent Claim
18 words
The process as claimed in claim 26, wherein said coating is provided on one side of said substrate.
Claim 31
Dependent Claim
18 words
The process as claimed in claim 26, wherein said coating is provided on both side of said substrate.
Claim 32
Dependent Claim
18 words
The process as claimed in claim 26, wherein the molecular weight of said polypropylene wax is approximately 2000.
Claim 33
Dependent Claim
21 words
The process as claimed in claim 19, wherein said coating further comprises additives for modifying the heat sealability of said coating.
Claim 34
Dependent Claim
14 words
The process as claimed in claim 31, wherein said additive is ethylene-vinyl acetate copolymer.
Claim 35
Dependent Claim
22 words
The process as claimed in claim 32, wherein the molecular weight of said ethylene-vinyl acetate copolymer is between about 1,000 to 12,000.
Claim 36
Dependent Claim
18 words
The process as claimed in claim 31, wherein said coating is provided on one side of said substrate.
Claim 37
Dependent Claim
18 words
The process as claimed in claim 31, wherein said coating is provided on both side of said substrate.
Claim 38
Dependent Claim
18 words
The process as claimed in claim 31, wherein the molecular weight of said propylene wax is approximately 2000.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-10 | 1994-12-10 | 1995-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-10 | 1998-12-10 | 1999-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-10 | 2002-12-10 | 2003-06-11 | $7700.00 | Window Closed / Lapsed |