Patent US3714066A successfully refreshed from Google Patents.
US3714066A
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Methods of inhibiting corrosion with ethane diphosphonate compositions
Assignee: Monsanto Co
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Filing: 1970-04-13
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Granted: 1973-01-30
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Expires: 1990-04-13
Abstract
Abstract WHEREIN R1 and R2 are hereinafter defined and R3 is hydrogen or a metal ion and n is an integer having a value of 1 or 2, along or in combination with zinc, dichromate, certain thiols and 1,2,3-triazoles and mixtures thereof, are disclosed as inhibiting the corrosion of metals by oxygen-bearing waters. Ethane diphosphonates having the formula
Inventors
- 👤 T King
- 👤 H Vandersall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:46
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
47 words
A composition useful for inhibiting the corrosion of metals in a water system comprising from about 10 percent to about 80 percent by weight of a water soluble zinc salt and from about 20 percent to 90 percent by weight of an ethane diphosphonate having the formula
Claim 2
Dependent Claim
47 words
A composition useful for inhibiting the corrosion of metals in a water system comprising from about 10 percent to about 80 percent by weight of a water soluble zinc salt and from about 20 percent to 90 percent by weight of an ethane diphosphonate having the formula
Claim 3
Dependent Claim
17 words
from about 20 percent to about 90 percent by weight of an ethane diphosphonate having the formula
Claim 4
Dependent Claim
17 words
from about 20 percent to about 90 percent by weight of an ethane diphosphonate having the formula
Claim 5
Dependent Claim
12 words
The composition as set forth in claim 1 wherein R3 is hydrogen.
Claim 6
Dependent Claim
36 words
from about 1 percent to about 10 percent by weight of a compound selected from the group consisting of 1, 2, 3 -triazoles, thiols of thiazoles, thiols of oxazoles, thiols of imidazoles, and mixtures thereof, and
Claim 7
Dependent Claim
36 words
from about 1 percent to about 10 percent by weight of a compound selected from the group consisting of 1, 2, 3 -triazoles, thiols of thiazoles, thiols of oxazoles, thiols of imidazoles, and mixtures thereof, and
Claim 8
Dependent Claim
25 words
The composition as set forth in claim 1 wherein R3 is a cation selected from the group consisting of alkali metals, zinc, and mixtures thereof.
Claim 9
Dependent Claim
13 words
up to about 79 percent by weight of a water soluble zinc salt.
Claim 10
Dependent Claim
13 words
up to about 79 percent by weight of a water soluble zinc salt.
Claim 11
Dependent Claim
28 words
The composition as set forth in claim 1 wherein R1 and R2 are either hydroxy or -N(R4)2 groups with the proviso that neither R1 nor R2 are alike.
Claim 12
Dependent Claim
28 words
The composition as set forth in claim 1 wherein R1 and R2 are either -XR5 or hydroxy groups with the proviso that neither R1 nor R2 are alike.
Claim 13
Dependent Claim
27 words
The composition as set forth in claim 1 wherein R1 and R2 are either -CN or hydroxy with the proviso that neither R1 nor R2 are alike.
Claim 14
Dependent Claim
16 words
The composition as set forth in claim 1 wherein R1 and R2 are both hydroxy groups.
Claim 15
Dependent Claim
27 words
The composition as set forth in claim 1 wherein R1 and R2 are either hydroxy or -SO3R6 with the proviso that neither R1 nor R2 are alike.
Claim 16
Dependent Claim
27 words
The composition as set forth in claim 1 wherein R1 and R2 are either halogen or hydroxy with the proviso that neither R1 nor R2 are alike.
Claim 17
Dependent Claim
26 words
The composition as set forth in claim 1 wherein R1 and R2 are either hydroxy or with the proviso that neither R1 nor R2 are alike.
Claim 18
Dependent Claim
21 words
The composition as set forth in claim 7 wherein the water soluble zinc salt is zinc sulfate and R3 is hydrogen.
Claim 19
Dependent Claim
17 words
The composition as set forth in claim 1 and additionally containing a water-soluble hexavalent compound of chromium.
Claim 20
Dependent Claim
18 words
A composition useful for inhibiting the corrosion of metals in a water system which contains cuprous metals comprising
Claim 21
Dependent Claim
18 words
A composition useful for inhibiting the corrosion of metals in a water system which contains cuprous metals comprising
Claim 22
Dependent Claim
33 words
The composition as set forth in claim 13 wherein the diphosphonate is selected from the group consisting of 1,2-dihydroxyethane-1,1-diphosphonic acid; Dipotassium 2-cyano-1-hydroxyethane-1,1-diphosphonate; Disodium 2-butyl amino-1-hydroxyethane-1,1-diphosphonate; Dibutyl 2-hydroxy-2,2-diphosphono ethylmalonate; 2-thiomethyl-1-hydroxyethane-1,1-diphosphonic acid; and 2-oxyethane-1,1-diphosphonic acid.
Claim 23
Dependent Claim
17 words
The composition as set forth in claim 13 and additionally containing a water-soluble hexavalent compound of chromium.
Claim 24
Independent Claim
33 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 an ethane diphosphonate having the formula
Claim 25
Independent Claim
33 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 an ethane diphosphonate having the formula
Claim 26
Dependent Claim
12 words
The method as set forth in claim 16 wherein R3 is hydrogen.
Claim 27
Dependent Claim
32 words
The method as set forth in claim 16 wherein R3 is a metal ion selected from the group consisting of alkali metals, alkaline earth metals, aluminum, zinc, calcium, manganese and mixtures thereof.
Claim 28
Dependent Claim
28 words
The method as set forth in claim 16 wherein R1 and R2 are either hydroxy or -N(R4)2 groups with the proviso that neither R1 nor R2 are alike.
Claim 29
Dependent Claim
28 words
The method as set forth in cLaim 16 wherein R1 and R2 are either -XR5 or hydroxy groups with the proviso that neither R1 nor R2 are alike.
Claim 30
Dependent Claim
27 words
The method as set forth in claim 16 wherein R1 and R2 are either -CN or hydroxy with the proviso that neither R1 nor R2 are alike.
Claim 31
Dependent Claim
16 words
The method as set forth in claim 16 wherein R1 and R2 are both hydroxy groups.
Claim 32
Dependent Claim
27 words
The method as set forth in claim 16 wherein R1 and R2 are either hydroxy or -SO3R6 with the proviso that neither R1 nor R2 are alike.
Claim 33
Dependent Claim
27 words
The method as set forth in claim 16 wherein R1 and R2 are either halogen or hydroxy with the proviso that neither R1 nor R2 are alike.
Claim 34
Dependent Claim
26 words
The method as set forth in claim 16 wherein R1 and R2 are either hydroxy or with the proviso that neither R1 nor R2 are alike.
Claim 35
Dependent Claim
21 words
The method as set forth in claim 16 and additionally containing in said system a water soluble hexavalent compound of chromium.
Claim 36
Dependent Claim
19 words
The method as set forth in claim 16 and additionally containing in said system a water soluble zinc salt.
Claim 37
Dependent Claim
27 words
The method as set forth in claim 16 and additionally containing in said system a water soluble hexavalent compound of chromium and a water soluble zinc salt.
Claim 38
Dependent Claim
45 words
The method as set forth in claim 16 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 39
Dependent Claim
19 words
The method as set forth in claim 29 wherein the water system additionally contains a water soluble zinc salt.
References Cited (Backward Citations)
US3024021A
Cited
US3431217A
Cited
US3483133A
Cited
US3532639A
Cited
US3617576A
Cited
US3625716A
Cited
US3654151A
Cited
US3664975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |