Patent US4174368A successfully refreshed from Google Patents.
US4174368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curved sausage casings
Assignee: Union Carbide Corp
•
Filing: 1978-07-31
•
Granted: 1979-11-13
•
Expires: 1998-07-31
Abstract
Abstract A method of producing a curved sausage casing by treating a sausage casing before curving with caustic solution and neutralizing the casing while in the curved configuration.
Inventors
- 👤 Herman S. Chiu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:31
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
A method of producing curved regenerated cellulose casings which comprises the steps of (a) passing a regenerated cellulose tubular casing in contact with a cellulosic swelling solution for a time and at a concentration sufficient to plasticize said casing; (b) inflating the plasticized casing with an inert fluid; (c) passing said inflated plasticized casing around and in contact with a cylindrical surface to conform the shape of said plasticized casing to the shape of said cylindrical surface; (d) contacting said plasticized inflated casing with a neutralizing agent while said plasticized casing is disposed on said cylindrical surface, said neutralizing agent being employed in an amount and for a time sufficient to neutralize said cellulosic swelling solution impregnated in said casing; (e) removing said neutralized casing from said cylindrical surface and thereafter; (f) washing, plasticizing and drying said casing.
Claim 2
Independent Claim
138 words
A method of producing curved regenerated cellulose casings which comprises the steps of (a) passing a regenerated cellulose tubular casing in contact with a cellulosic swelling solution for a time and at a concentration sufficient to plasticize said casing; (b) inflating the plasticized casing with an inert fluid; (c) passing said inflated plasticized casing around and in contact with a cylindrical surface to conform the shape of said plasticized casing to the shape of said cylindrical surface; (d) contacting said plasticized inflated casing with a neutralizing agent while said plasticized casing is disposed on said cylindrical surface, said neutralizing agent being employed in an amount and for a time sufficient to neutralize said cellulosic swelling solution impregnated in said casing; (e) removing said neutralized casing from said cylindrical surface and thereafter; (f) washing, plasticizing and drying said casing.
Claim 3
Dependent Claim
15 words
A method according to claim 1 wherein said cellulosic swelling solution is a caustic solution.
Claim 4
Dependent Claim
24 words
A method according to claim 2 wherein the caustic solution is selected from the group consisting of sodium hydroxide, potassium hydroxide and lithium hydroxide.
Claim 5
Dependent Claim
23 words
A method according to claim 1 wherein said cellulosic swelling solution is selected from the group consisting of liquid ammonia and potassium thiocyanate.
Claim 6
Dependent Claim
23 words
A method according to claim 2 wherein the concentration of said caustic solution is in a range of about 7% to about 30%.
Claim 7
Dependent Claim
22 words
A method according to claim 2 wherein the concentration of caustic solution is in the range of about 15% to about 25%.
Claim 8
Dependent Claim
28 words
A method according to claim 1 wherein the neutralizing agent is selected from the group consisting of sulfuric acid, hydrochloric acid, nitric acid, acetic acid and citric acid.
Claim 9
Dependent Claim
20 words
A method according to claim 7 wherein the concentration of said neutralizing agent is from about 5% to about 20%.
Claim 10
Dependent Claim
15 words
A method according to claim 7 wherein the concentration of neutralizing agent is about 15%.
References Cited (Backward Citations)
US1807036A
Cited
US1961268A
Cited
US1997349A
Cited
US2136566A
Cited
US2925621A
Cited
US3155752A
Cited
GB1406015A
Cited
DE2308065A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |