Patent US5056579A successfully refreshed from Google Patents.
Patent US3905397A successfully refreshed from Google Patents.
US3905397A
Expired / Lapsed
US
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Tubular food casings
Assignee: Union Carbide Corp
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Filing: 1974-10-15
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Granted: 1975-09-16
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Expires: 1994-10-15
Abstract
Abstract A tubular food casing having a coating adhered to the internal surface thereof comprising the reaction product of a polyethylene imine polymer and a dimer of a ketene having the formula where R and R'' are selected from the group consisting of hydrogen and C4-C26 alkyl, aryl and cycloalkyl groups, not more than one of the R and R'' groups being hydrogen, and said coating being present in an amount sufficient to impart improved peelability of said coated casing from food products processed therein.
Inventors
- 👤 Herman S Chiu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:14
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; A22C13/0016; C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; A22C2013/003; A22C2013/0096; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1324
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
30 words
A TUBULAR FOOD CASING HAVING A COATING ADHERED TO THE INNER SURFACE THEREOF COMPRISING THE REACTION PRODUCT OF POLYTHYLENE IMINE POLYMER AND A DIME OF A KETENE HAVING THE FORMULA
Claim 2
Dependent Claim
30 words
A TUBULAR FOOD CASING HAVING A COATING ADHERED TO THE INNER SURFACE THEREOF COMPRISING THE REACTION PRODUCT OF POLYTHYLENE IMINE POLYMER AND A DIME OF A KETENE HAVING THE FORMULA
Claim 3
Dependent Claim
59 words
The food casing of claim 1 in which said ketene dimer is present in an amount between 2 mg/100 in2 and 16 mg/100 in2 of casing surface and said polyethylene imine polymer is present in an amount of at least 0.2 mg/100 in2 and in a weight ratio to said ketene dimer that ranges between about 1:1 and 1:20.
Claim 4
Dependent Claim
28 words
The food casing of claim 2 wherein said polyethylene imine polymer is present in said coating in the ratio by weight to said ketene dimer of about 1:5.
Claim 5
Dependent Claim
33 words
The casing of claim 1 wherein said ketene dimer is an alkylketene dimer derived from a fatty acid selected from the group consisting of oleic acid, palmitic acid, stearic acid and mixtures thereof.
Claim 6
Dependent Claim
17 words
The casing of claim 1 wherein said ketene dimer is an alkylketene dimer derived from oleic acid.
Claim 7
Dependent Claim
23 words
The casing of claim 1 wherein said ketene dimer is an alkylketene dimer derived from a mixture of palmitic and stearic fatty acids.
Claim 8
Dependent Claim
24 words
The casing of claim 1 wherein said polyethylene imine polymer is water soluble and has a molecular weight of at least about 20, 000.
Claim 9
Dependent Claim
15 words
The tubular casing of claim 1 wherein said tubular casing comprises a fibrous cellulosic casing.
Claim 10
Independent Claim
55 words
THE METHOD OR PREPARING A TUBULAR FOOD CASING THAT EXHIBITS IMPROVED PEELABILITY CHARACTERISTICS TO MEAT PRODUCTS ENCASED THEREIN WHICH COMPRISES HE STEPS OF COATING THE INSIDE SURFACE OF A TUBULAR FOOD CASING WITH AN AQUEOUS COATING COMPSITION COMPRISING A CURABLE ADMIXTURE OF A POLYETHYLEN IMINE POLYMER AND A DIMER OF A KETTENE HAVING HE FORMULA
Claim 11
Independent Claim
55 words
THE METHOD OR PREPARING A TUBULAR FOOD CASING THAT EXHIBITS IMPROVED PEELABILITY CHARACTERISTICS TO MEAT PRODUCTS ENCASED THEREIN WHICH COMPRISES HE STEPS OF COATING THE INSIDE SURFACE OF A TUBULAR FOOD CASING WITH AN AQUEOUS COATING COMPSITION COMPRISING A CURABLE ADMIXTURE OF A POLYETHYLEN IMINE POLYMER AND A DIMER OF A KETTENE HAVING HE FORMULA
Claim 12
Dependent Claim
50 words
The method of claim 9 in which the concentration of ketene dimer in said aqueous coating composition is between about 0.3% and 5% by weight and the polyethylene imine polymer is present in said coating composition in the ratio by weight to ketene dimer of between about 1:1 and 1:20.
Claim 13
Dependent Claim
33 words
The method of claim 9 wherein said ketene dimer is an alkylketene dimer derived from a fatty acid selected from the group consisting of oleic acid, palmitic acid, stearic acid and mixtures thereof.
Claim 14
Dependent Claim
18 words
The method of claim 9 in which said ketene dimer is an alkylketene dimer derived from oleic acid.
Claim 15
Dependent Claim
24 words
The method of claim 9 in which said ketene dimer is an alkylketene dimer derived from a mixture of palmitic and stearic fatty acids.
Claim 16
Dependent Claim
24 words
The method of claim 9 in which said polyethylene imine polymer is water soluble and has a molecular weight of at least about 20,000.
Claim 17
Dependent Claim
24 words
The method of claim 11 in which said polyethylene imine polymer is water soluble and has a molecular weight of at least about 20,000.
Claim 18
Dependent Claim
15 words
The method of claim 9 wherein said tubular food casing is a fibrous cellulosic casing.
Claim 19
Dependent Claim
37 words
The method of claim 9 wherein said coating composition is applied to the inside surface of said casing in an amount sufficient to provide at least about 2 mg/100 in2 of casing surface of said ketene dimer.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |