US4511613A
Expired / Lapsed
US
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Method for inhibiting discoloration on cellulose food casings
Assignee: Viskase Corp
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Filing: 1984-06-27
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Granted: 1985-04-16
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Expires: 2004-06-27
Abstract
Abstract A process and composition for inhibiting discoloration and the formation of black spots upon a cellulose food casing treated with a liquid smoke solution derived from natural wood and containing smoke color, odor and flavor constituents, comprising contacting the food casing with an agent having the ability to prevent the progressive oxidation of metals.
Inventors
- 👤 Myron D. Nicholson
- 👤 Herman S. Chiu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:33
CPC Classifications
A; A23; A23B; A23B4/00; A23B4/044; A23B4/052; A23B4/0526; A22; A22C; A22C13/00; A22C13/0013; A23B4/10; A22C2013/0096
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
87 words
A method for inhibiting discoloration and the formation of black spots upon a cellulose food casing treated with a liquid smoke solution derived from natural wood and containing smoke color, odor and flavor constituents, said method comprising contacting said casing with an agent having the ability to prevent the progressive oxidation of metals, said agent being selected from the group consisting of a coordination compound and a reducing agent, wherein said reducing agent is selected from the group consisting of hydrogen sulfide, sulfur dioxide, and sodium hydrosulfite.
Claim 2
Independent Claim
87 words
A method for inhibiting discoloration and the formation of black spots upon a cellulose food casing treated with a liquid smoke solution derived from natural wood and containing smoke color, odor and flavor constituents, said method comprising contacting said casing with an agent having the ability to prevent the progressive oxidation of metals, said agent being selected from the group consisting of a coordination compound and a reducing agent, wherein said reducing agent is selected from the group consisting of hydrogen sulfide, sulfur dioxide, and sodium hydrosulfite.
Claim 3
Dependent Claim
13 words
A method according to claim 1 wherein said agent is a reducing agent.
Claim 4
Dependent Claim
13 words
A method according to claim 1 wherein said agent is a coordination compound.
Claim 5
Dependent Claim
22 words
A method according to claim 3 wherein said coordination compound is selected from the group consisting of chelating agents and sequestering agents.
Claim 6
Dependent Claim
14 words
A method according to claim 3 wherein said coordination compound is an inorganic material.
Claim 7
Dependent Claim
14 words
A method according to claim 5 wherein said inorganic material is a condensed polyphosphate.
Claim 8
Dependent Claim
21 words
A method according to claim 6 wherein said condensed polyphosphate is selected from the group consisting of pyrophosphates, metaphosphates, and tripolyphosphates.
Claim 9
Dependent Claim
22 words
A method according to claim 5 wherein said inorganic material is selected from the group consisting of monobasic phosphate and dibasic phosphate.
Claim 10
Dependent Claim
35 words
A method according to claim 5 wherein said inorganic material is present in an amount of between about three percent and about twenty percent by weight based on the weight of said liquid smoke solution.
Claim 11
Dependent Claim
35 words
A method according to claim 5 wherein said inorganic material is present in an amount of between about seven percent and about twelve percent by weight based on the weight of said liquid smoke solution.
Claim 12
Dependent Claim
14 words
A method according to claim 3 wherein said coordination compound is an organic material
Claim 13
Dependent Claim
26 words
A method according to claim 11 wherein said organic material is selected from the group consisting of amino polycarboxylic acids, hydroxy carboxylic acids, and their salts.
Claim 14
Dependent Claim
24 words
A method according to claim 11 wherein said organic material is selected from the group consisting of ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, and their salts.
Claim 15
Dependent Claim
24 words
A method according to claim 11 wherein said organic material is selected from the group consisting of citric acid, tartaric acid, and their salts.
Claim 16
Dependent Claim
35 words
A method according to claim 11 wherein said coordination compound is present in an amount of between about one percent and about twenty percent by weight based on the weight of said liquid smoke solution.
Claim 17
Dependent Claim
17 words
A method according to claim 1 wherein said liquid smoke solution comprises a tar-depleted liquid smoke solution.
Claim 18
Dependent Claim
52 words
A method according to claim 16 wherein said tar-depleted liquid smoke solution is produced by extraction of an as-is aqueous liquid smoke solution with an organic liquid solvent to form a tar-enriched organic liquid fraction and a tar-depleted aqueous liquid smoke fraction, and said tar-depleted fraction is separated from said tar-enriched fraction.
Claim 19
Dependent Claim
68 words
A method according to claim 16 wherein said tar-depleted liquid smoke solution is obtained by providing a tar-containing aqueous liquid smoke solution, partially neutralizing said solution to a pH of at least about 4 to form a tar-enriched fraction and a tar-depleted fraction while controlling the temperature of said solution during neutralization to a temperature not exceeding 40° C., and separating the fractions to recover said tar-depleted fraction.
Claim 20
Dependent Claim
39 words
A method according to claim 16 wherein said tar-depleted liquid smoke solution is obtained by neutralizing a tar-containing aqueous liquid smoke solution to a pH greater than 4 and filtering said solution to remove therefrom the resulting precipitated tar.
Claim 21
Dependent Claim
51 words
A method according to claim 1 wherein said liquid smoke solution comprises a concentrated liquid smoke solution prepared from a tar-depleted aqueous liquid smoke solution obtained by concentrating said tar-depleted solution to a weight of between about one half and about one fifth of the original weight of said tar-depleted solution.
Claim 22
Dependent Claim
20 words
A method according to claim 1 including contacting said casing with an agent for improving the peelability of said casing.
Claim 23
Dependent Claim
23 words
A method according to claim 1 wherein said agent has the ability to prevent the progressive oxidation of iron to the ferric state.
Claim 24
Dependent Claim
33 words
A method according to claim 1 wherein said agent is present on said food casing in an amount of between about 0.1 to about 5 mg. per square inch of said food casing.
Claim 25
Dependent Claim
13 words
A method according to claim 1 wherein said casing is a non-fibrous casing.
Claim 26
Dependent Claim
13 words
A method according to claim 1 wherein said casing is a fibrous casing.
Claim 27
Dependent Claim
10 words
A method according to claim 1 including shirring said casing.
Claim 28
Dependent Claim
24 words
A method acording to claim 1 wherein said casing is contacted with said agent prior to treating said casing with said liquid smoke solution.
Claim 29
Dependent Claim
23 words
A method according to claim 1 wherein said casing is contacted with said agent after treating said casing with said liquid smoke solution.
Claim 30
Dependent Claim
23 words
A method according to claim 1 wherein said casing is contacted with said agent while treating said casing with said liquid smoke solution.
Claim 31
Dependent Claim
18 words
A method according to claim 1 wherein said casing is contacted with said agent while shirring said casing.
Claim 32
Dependent Claim
21 words
A method according to claim 1 wherein said casing is contacted with said agent on the external surface of said casing.
Claim 33
Dependent Claim
21 words
A method according to claim 1 wherein said agent is added to said liquid smoke solution employed to treat said casing.
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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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |