US4647314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rinse water additive
Assignee: Ashland Inc
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Filing: 1985-03-05
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Granted: 1987-03-03
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Expires: 2005-03-05
Abstract
Abstract Can containing food are rinsed with an aqueous solution of quaternary ammonium salt and oxyalkylene polymer (homopolymer of oxyethylene or copolymer of oxyethylene and oxypropylene).
Inventors
- 👤 Michael A. Mullins
- 👤 Peter A. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:29
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3703; C11D3/3707; C11D1/00; C11D1/38; C11D1/62; C23; C23F; C23F11/00; C23F11/08; C23F11/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
A process for rinsing cans containing food after steaming of the cans, comprising: rinsing the cans with water containing an effective rinsing amount of a water soluble quaternary ammonium salt and a water soluble oxyalkylene polymer selected from the group consisting of oxyethylenehomopolymers having a molecular weight of at least 500 and not in excess of 6,000, and copolymers of oxyethylene and oxypropylene wherein the oxyethylene content is from 50% to 99% by weight, and the molecular weight is at least 1,000 and does not exceed 10,000, with the weight ratio of oxyalkylene polymer to quaternary ammonium salt being from 1:25 to 25:1, and said quaternary ammonium salt having the following structural formula: ##STR2## wherein each R 1 , R 2 (and) R 3 and R 4 is a hydrocarbon radical having from 1-18 carbon atoms and at least two of R 1 , R 2 , R 3 and R 4 contain at least 7 carbon atoms and A is an anion.
Claim 2
Dependent Claim
163 words
A process for rinsing cans containing food after steaming of the cans, comprising: rinsing the cans with water containing an effective rinsing amount of a water soluble quaternary ammonium salt and a water soluble oxyalkylene polymer selected from the group consisting of oxyethylenehomopolymers having a molecular weight of at least 500 and not in excess of 6,000, and copolymers of oxyethylene and oxypropylene wherein the oxyethylene content is from 50% to 99% by weight, and the molecular weight is at least 1,000 and does not exceed 10,000, with the weight ratio of oxyalkylene polymer to quaternary ammonium salt being from 1:25 to 25:1, and said quaternary ammonium salt having the following structural formula: ##STR2## wherein each R 1 , R 2 (and) R 3 and R 4 is a hydrocarbon radical having from 1-18 carbon atoms and at least two of R 1 , R 2 , R 3 and R 4 contain at least 7 carbon atoms and A is an anion.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the oxyethylene content of the copolymer is from 40% to 60% by weight.
Claim 4
Dependent Claim
36 words
The process of claim 2 wherein two of the groups represented by R 1 -R 4 have 1-2 carbon atom, and the remaining two groups represented by R 1 -R 4 have from 7-18 carbon atoms.
Claim 5
Dependent Claim
21 words
The process of claim 3 wherein the weight ratio of oxyalkylene polymer to quaternary ammonium salt is from 1:1 to 5:1.
References Cited (Backward Citations)
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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) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |