Patent US4431032A successfully refreshed from Google Patents.
US4431032A
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Tar-depleted liquid smoke treatment of food casings
Assignee: Viskase Corp
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Filing: 1982-09-14
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Granted: 1984-02-14
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Expires: 2002-09-14
Abstract
Abstract A tar-containing aqueous liquid wood smoke is at least partially neutralized under controlled temperature to form a tar-enriched fraction and a tar-depleted liquid smoke fraction, and the latter is used for food casing treatment to facilitate smoke coloring and flavoring of encased foodstuff during processing.
Inventors
- 👤 Myron D. Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:52
CPC Classifications
A; A23; A23B; A23B4/00; A23B4/044; A23B4/052; A23B4/0526; A22; A22C; A22C13/00; A22C13/0013; A23L; A23L27/00; A23L27/20; A23L27/27; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1324
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
160 words
A tar-depleted liquid smoke treated tubular food casing prepared by the steps of providing a tar-containing aqueous liquid smoke solution at temperature below about 40° C. and having an absorptive power of at least about 0.25 at 340 nm. wave length; at least partially neutralizing said aqueous liquid smoke solution by contacting a high pH constituent therewith in sufficient quantity to raise the pH thereof to above about 4 to thereby form a tar-enriched fraction and a tar-depleted liquid smoke fraction; controlling the temperature of said aqueous liquid smoke solution during said neutralizing so that the solution temperature does not rise above about 40° C.; separating said tar-enriched fraction and said tar-depleted liquid smoke fraction to recover the latter as a tar-depleted liquid smoke; and treating a surface of a tubular food casing with said tar-depleted liquid smoke in sufficient quantity to provide an absorptive index of at least about 0.2 at 340 nm. wave length for the casing wall.
Claim 2
Dependent Claim
160 words
A tar-depleted liquid smoke treated tubular food casing prepared by the steps of providing a tar-containing aqueous liquid smoke solution at temperature below about 40° C. and having an absorptive power of at least about 0.25 at 340 nm. wave length; at least partially neutralizing said aqueous liquid smoke solution by contacting a high pH constituent therewith in sufficient quantity to raise the pH thereof to above about 4 to thereby form a tar-enriched fraction and a tar-depleted liquid smoke fraction; controlling the temperature of said aqueous liquid smoke solution during said neutralizing so that the solution temperature does not rise above about 40° C.; separating said tar-enriched fraction and said tar-depleted liquid smoke fraction to recover the latter as a tar-depleted liquid smoke; and treating a surface of a tubular food casing with said tar-depleted liquid smoke in sufficient quantity to provide an absorptive index of at least about 0.2 at 340 nm. wave length for the casing wall.
Claim 3
Dependent Claim
43 words
A tar-depleted liquid smoke treated casing according to claim 1 wherein only the outer wall of said casing is treated with said tar-depleted liquid smoke such that the exterior surface of the so-treated casing is darker than the interior surface of said casing.
Claim 4
Dependent Claim
22 words
A tar-depleted liquid smoke treated casing according to claim 1 wherein the initial staining index of said casing is at least 0.2.
Claim 5
Dependent Claim
26 words
A tar-depleted liquid smoke treated casing according to claim 1 in which said high pH constituent raises the aqueous liquid smoke solution pH to about 6.
Claim 6
Dependent Claim
32 words
A tar-depleted liquid smoke treated casing according to claim 1 in which the solution temperature is controlled during the at least partial neutralization so as not to rise above about 30° C.
Claim 7
Dependent Claim
45 words
A tar-depleted liquid smoke treated casing according to claim 1 in which said high pH constituent raises the aqueous liquid smoke solution pH to about 6 and the solution temperature is controlled during the partial neutralization so as not to rise above about 30° C.
Claim 8
Dependent Claim
19 words
A tar-depleted liquid smoke treated casing according to claim 1 in which said casing comprises a non-fibrous cellulosic casing.
Claim 9
Dependent Claim
19 words
A tar-depleted liquid smoke treated casing according to claim 1 in which said casing comprises a fibrous cellulosic casing.
Claim 10
Dependent Claim
28 words
A tar-depleted liquid smoke treated casing according to claim 1 in which said liquid smoke solution has a total acid content of at least about 7 weight percent.
Claim 11
Dependent Claim
28 words
A tar-depleted liquid smoke treated casing according to claim 1 in which said liquid smoke solution has a total acid content of at least about 9 weight percent.
Claim 12
Dependent Claim
29 words
A tar-depleted liquid smoke treated casing according to claim 1 in which said liquid smoke composition has an absorptive power greater than about 0.2 at 340 nm. wave length.
Claim 13
Dependent Claim
35 words
A tar-depleted liquid smoke treated casing according to claim 1 in which the tar-depleted liquid smoke treatment provides an absorptive index of at least about 0.4 at 340 nm. wave length for the casing wall.
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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) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |