US4418119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ovenable board
Assignee: Loparex Inc
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Filing: 1981-11-18
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Granted: 1983-11-29
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Expires: 2001-11-18
Abstract
Abstract Ovenable board comprising a paperboard or the like, base material having a coating of polyvinyl alcohol and a silicone. The ovenable board is especially adapted for use in packaging pre-prepared food products such as pizza and bakery goods.
Inventors
- 👤 George W. Morrow
- 👤 Phillip R. Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:29
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/80; D21H19/82; D21H19/824; B; B65; B65D; B65D81/00; B65D81/34; B65D81/343; B65D2581/00; B65D2581/34; B65D2581/3401; B65D2581/3402; B65D2581/3405; D21H19/10; D21H19/12; D21H19/14; D21H19/24; D21H19/32; D21H27/00; D21H27/10; Y; Y10; Y10S; Y10S229/00; Y10S229/902; Y10S229/903; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
165 words
An ovenable board for packaging of pizza comprising a paperboard substrate material having two discrete coatings palced thereon, the first coating comprising at least one addition to the surface of said substrate of a coating of polyvinyl alcohol, said polyvinyl alcohol being present on the paper substrate material in an amount in the range of from about 3 to about 12 pounds per ream of said paperboard substrate and a second coating comprising a layer of a silicone release coating being placed on the exposed surface of said first coating of polyvinyl alcohol, said second coating being present on the surface of said first coating comprising polyvinyl alcohol in an amount in the range of from about 0.7 to about 0.9 pounds per ream of said paperboard substrate and being inert to and not absorbed by the components of said pizza which are in contact with said second coating, that their integrity is unaffected at temperatures ranging from about 0° F. to about 350° F.
Claim 2
Dependent Claim
165 words
An ovenable board for packaging of pizza comprising a paperboard substrate material having two discrete coatings palced thereon, the first coating comprising at least one addition to the surface of said substrate of a coating of polyvinyl alcohol, said polyvinyl alcohol being present on the paper substrate material in an amount in the range of from about 3 to about 12 pounds per ream of said paperboard substrate and a second coating comprising a layer of a silicone release coating being placed on the exposed surface of said first coating of polyvinyl alcohol, said second coating being present on the surface of said first coating comprising polyvinyl alcohol in an amount in the range of from about 0.7 to about 0.9 pounds per ream of said paperboard substrate and being inert to and not absorbed by the components of said pizza which are in contact with said second coating, that their integrity is unaffected at temperatures ranging from about 0° F. to about 350° F.
Claim 3
Independent Claim
166 words
A method of making an ovenable board which comprises: (a) applying an aqueous solution of a first coating substrate comprising polyvinyl alcohol to a paperboard substrate material, drying said paperboard substrate material at a temperature of from about 300° F. to about 350° F. to provide a loading of said first polyvinyl coating on the dried paperboard substrate material of the order of from about 3 to about 12 pounds of polyvinyl alcohol per ream of said paperboard substrate material; (b) then applying a second solution comprising a silicone and a silicone catalyst to the first substrate coating of polyvinyl alcohol, which is coated to said paperboard substrate material, said silicone being applied until the same is present in an amount sufficient to provide a loading of said silicone to said polyvinyl first coating substrate of from about 0.7 to about 0.9 pounds per ream of said paperboard substrate material; and (c) drying and curing the silicone second substrate at a temperature of about 325° F.
Claim 4
Independent Claim
166 words
A method of making an ovenable board which comprises: (a) applying an aqueous solution of a first coating substrate comprising polyvinyl alcohol to a paperboard substrate material, drying said paperboard substrate material at a temperature of from about 300° F. to about 350° F. to provide a loading of said first polyvinyl coating on the dried paperboard substrate material of the order of from about 3 to about 12 pounds of polyvinyl alcohol per ream of said paperboard substrate material; (b) then applying a second solution comprising a silicone and a silicone catalyst to the first substrate coating of polyvinyl alcohol, which is coated to said paperboard substrate material, said silicone being applied until the same is present in an amount sufficient to provide a loading of said silicone to said polyvinyl first coating substrate of from about 0.7 to about 0.9 pounds per ream of said paperboard substrate material; and (c) drying and curing the silicone second substrate at a temperature of about 325° F.
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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) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |