Patent US4401624A successfully refreshed from Google Patents.
US4401624A
Expired / Lapsed
US
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Buffered solutions which have a reduced corrosive nature
Assignee: Syntex USA LLC
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Filing: 1982-03-08
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Granted: 1983-08-30
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Expires: 2002-03-08
Abstract
Abstract A method is disclosed for preparing and using buffered aqueous solutions of carboxylic acids and metal salts of carboxylic acids. Such solutions are useful as mold inhibitors in bread, cakes, and animal feeds. Buffered aqueous solutions of about 40 to 80 percent of compounds of carboxylic acids and carboxylic acid metal salts, such as sodium diacetate, sodium dipropionate, sodium dibutyrate or sodium dibenzoate have been found to have a reduced corrosive nature to metals and alloys used to contain, transport, and apply these solutions, thereby permitting the use of these metals and alloys in existing and new facilities.
Inventors
- 👤 Charles B. Atwater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:21
CPC Classifications
C; C07; C07C; C07C53/00; C07C53/02; C07C53/06; A; A21; A21D; A21D2/00; A21D2/08; A21D2/14; A21D2/145; A23; A23B; A23B2/00; A23B2/70; A23B2/725; A23B2/729; A23B2/742; A23B2/754; A23B9/00; A23B9/16; A23B9/24; A23B9/26; A23K; A23K30/00; C07C53/122; C07C53/124; C07C53/126; C07C63/00; C07C63/04; C07C63/06; C07C63/08; Y; Y10; Y10S; Y10S426/00; Y10S426/807
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
A method for reducing the corrosion of metals in contact with an aqueous solution of a carboxylic acid which comprises maintaining said metal in contact with an aqueous solution of: (a) about one equivalent of a metal salt of a carboxylic acid having the formula R'C(O)O -+ M; (b) about one equivalent of a carboxylic acid having the formula R"C(O)OH; and (c) water to produce an aqueous solution containing about 40 to about 80 percent by weight of a compound having the formula R'C(O)O -+ M.R"C(O)OH wherein: R' and R" are independently selected from the group consisting of methyl, ethyl, propyl, iso-propyl, butyl, iso-butyl, tert-butyl and benzyl; and M is selected from the group consisting of sodium, potassium, and calcium.
Claim 2
Independent Claim
120 words
A method for reducing the corrosion of metals in contact with an aqueous solution of a carboxylic acid which comprises maintaining said metal in contact with an aqueous solution of: (a) about one equivalent of a metal salt of a carboxylic acid having the formula R'C(O)O -+ M; (b) about one equivalent of a carboxylic acid having the formula R"C(O)OH; and (c) water to produce an aqueous solution containing about 40 to about 80 percent by weight of a compound having the formula R'C(O)O -+ M.R"C(O)OH wherein: R' and R" are independently selected from the group consisting of methyl, ethyl, propyl, iso-propyl, butyl, iso-butyl, tert-butyl and benzyl; and M is selected from the group consisting of sodium, potassium, and calcium.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein said solution contains about 65 to about 75 percent by weight of said compound.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein R' and R" are ethyl and M is sodium.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein said solution contains about 70 percent by weight of said compound.
Claim 6
Dependent Claim
26 words
The method of claim 1 wherein said solution contains about 70 percent by weight of said compound, R' and R" are ethyl, and M is sodium.
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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |