Patent US3718603A successfully refreshed from Google Patents.
US3718603A
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Methods of inhibiting corrosion with substituted tertiary amine phosphonates
Assignee: Monsanto Co
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Filing: 1971-08-04
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Granted: 1973-02-27
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Expires: 1991-08-04
Abstract
Abstract Substituted tertiary amine phosphonates of the general formula WHEREIN R1, R2, R3, R4, R5, X and Y are hereinafter defined and n is 1 - 20, alone or in combination with zinc, dichromate, silicates, certain thiols and 1,2,3-triazoles and/or mixtures thereof, are disclosed as inhibiting the corrosion of metals by oxygen-bearing waters.
Inventors
- 👤 R Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:01
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305; G03C5/3053; A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/55; A61Q; A61Q11/00; C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808; C07F9/3817; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/167; C23F11/1676; D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/288; A61K2800/00; A61K2800/40; A61K2800/52; A61K2800/526
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
17 words
The composition as set forth in claim 1 wherein R1, R2, X and Y are all hydrogen.
Claim 2
Dependent Claim
12 words
The composition as set forth in claim 2 wherein R3 is ethylene.
Claim 3
Dependent Claim
29 words
The composition as set forth in claim 1 wherein R1 and R2 are each a cation selected from the group consisting of alkali metals, ammonia, zinc, and mixtures thereof.
Claim 4
Dependent Claim
23 words
The composition as set forth in claim 4 wherein the water soluble zinc salt is zinc sulfate and R1 and R2 are sodium.
Claim 5
Dependent Claim
17 words
The composition as set forth in claim 1 and additionally containing a water-soluble hexavalent compound of chromium.
Claim 6
Dependent Claim
40 words
A composition useful for inhibiting the corrosion of metals in a water system which contains cuprous metals consisting essentially of (1) from about 20 percent to about 90 percent by weight of a substituted tertiary amine having the general formula
Claim 7
Dependent Claim
20 words
The composition as set forth in claim 7 wherein said substituted tertiary amine is selected from the group consisting of
Claim 8
Dependent Claim
17 words
The composition as set forth in claim 7 and additionally containing a water-soluble hexavalent compound of chromium.
Claim 9
Independent Claim
35 words
A method of inhibitinG the corrosion of metals in a water system comprising maintaining in the water of said system at least 3 parts per million of a substituted tertiary amine having the general formula
Claim 10
Dependent Claim
17 words
The method as set forth in claim 10 wherein R1, R2, X and Y are all hydrogen.
Claim 11
Dependent Claim
12 words
The method as set forth in claim 11 wherein R4 is ethylene.
Claim 12
Dependent Claim
29 words
The method as set forth in claim 10 wherein R1 and R2 are each a cation selected from the group consisting of alkali metals, ammonia, zinc, and mixtures thereof.
Claim 13
Dependent Claim
21 words
The method as set forth in claim 10 and additionally containing in said system a water soluble hexavalent compound of chromium.
Claim 14
Dependent Claim
18 words
The method as set forth in claim 10 and additionally containing in said system a water-soluble zinc salt.
Claim 15
Dependent Claim
25 words
The method as set forth in claim 15 and additionally containing in said system a water-soluble hexavalent compound of chromium and a water-soluble zinc salt.
Claim 16
Dependent Claim
41 words
The method as set forth in claim 10 wherein said system contains cuprous metals and the water system additionally contains a compound selected from the group consisting of 1,2,3-triazoles, thiols of thiazoles, thiols of oxazoles, thiols of imidazoles, and mixtures thereof.
Claim 17
Dependent Claim
18 words
The method as set forth in claim 17 wherein the water system additionally contains a water-soluble zinc salt.
Claim 18
Independent Claim
58 words
A method of inhibiting metal corrosion in a water system containing metals comprising maintaining in the water of said system (a) from about 3 to about 100 ppm of ethoxy, ethoxy, ethoxy, propyl amino di(methylene phosphonic acid), (H2O3PCH2)2-N(CH2)2(OC2H4)2(OC2H5), or its water soluble salts and (b) up to about 100 ppm zinc ion derived from water soluble zinc salts.
Claim 19
Dependent Claim
47 words
A composition useful for inhibiting the corrosion of metals in a water system comprising from about 2 percent to about 80 percent by weight of a silicate and from about 20 percent to about 98 percent by weight of a substituted tertiary amine having the general formula
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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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |