Patent US4686059A successfully refreshed from Google Patents.
US4686059A
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Antimony tartrate corrosion inhibitive composition for coolant systems
Assignee: Prestone Products Corp USA
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Filing: 1986-02-12
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Granted: 1987-08-11
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Expires: 2006-02-12
Abstract
Abstract An automobile coolant concentrate comprising (a) a liquid polyhydric alcohol, and (b) a corrosion inhibitor comprising an alkali metal antimony tartrate, preferably with an azole compound, in a corrosion inhibitory amount with respect to corrosion of lead-containing solders.
Inventors
- 👤 Norman E. Payerle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:58
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C09; C09K; C09K5/00; C09K5/20; C23F11/10
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
40 words
An automobile coolant concentrate comprising (a) a liquid polyhydric alcohol chosen from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, and (b) an alkali metal antimony tartrate in corrosion inhibitory amount with respect to corrosion of lead-containing solders.
Claim 2
Dependent Claim
40 words
An automobile coolant concentrate comprising (a) a liquid polyhydric alcohol chosen from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, and (b) an alkali metal antimony tartrate in corrosion inhibitory amount with respect to corrosion of lead-containing solders.
Claim 3
Dependent Claim
12 words
The composition of claim 1, wherein the polyhydric alcohol is ethylene glycol.
Claim 4
Dependent Claim
15 words
The composition of claim 1, wherein the alkali metal antimony tartrate is potassium antimony tartrate.
Claim 5
Dependent Claim
35 words
The composition of claim 1, wherein the alkali metal antimony tartrate is present in an amount between about 0.01 wt.% to about 1 wt.%, based on K(SbO)C 4 H 4 O 6 .1/2H 2 O.
Claim 6
Dependent Claim
35 words
The composition of claim 1, wherein the alkali metal antimony tartrate is present in an amount between about 0.05 wt.% to about 0.5 wt.%, based on K(SbO)C 4 H 4 O 6 .1/2H 2 O.
Claim 7
Dependent Claim
31 words
The composition of claim 1, wherein the alkali metal antimony tartrate is present in an amount at about 0.1 wt.%, based on K(SbO)C 4 H 4 O 6 .1/2H 2 O.
Claim 8
Dependent Claim
23 words
The composition of claim 1 additionally comprising a metal surface corrosion inhibitor other than alkali metal antimony tartrate in a corrosion inhibitory amount.
Claim 9
Dependent Claim
18 words
The composition of claim 7 wherein the additional metal surface corrosion inhibitor inhibits corrosion with respect to aluminum.
Claim 10
Dependent Claim
19 words
The composition of claim 7 wherein the additional metal surface corrosion inhibitor inhibits corrosion with respect to ferrous metals.
Claim 11
Dependent Claim
15 words
The composition of claim 7 wherein the additional metal surface corrosion inhibitor is a silicate.
Claim 12
Dependent Claim
15 words
The composition of claim 7 wherein the additional metal surface corrosion inhibitor is a borate.
Claim 13
Dependent Claim
56 words
An automobile coolant concentrate comprising (a) a liquid polyhydric alcohol chosen from the group consisting of ethylene glycol, propylene glycol, diethylene glycol and mixtures thereof, and (b) corrosion inhibitors in a corrosion inhibitory amount with respect to corrosion of lead-containing solders, the corrosion inhibitors comprising (i) an alkali metal antimony tartrate, and (ii) an azole compound.
Claim 14
Dependent Claim
56 words
An automobile coolant concentrate comprising (a) a liquid polyhydric alcohol chosen from the group consisting of ethylene glycol, propylene glycol, diethylene glycol and mixtures thereof, and (b) corrosion inhibitors in a corrosion inhibitory amount with respect to corrosion of lead-containing solders, the corrosion inhibitors comprising (i) an alkali metal antimony tartrate, and (ii) an azole compound.
Claim 15
Dependent Claim
15 words
The coolant concentrate of claim 12 wherein the azole compound is 1,2,3-tolyltriazole, 1,2,3-benzotriazole,or sodium 2-mercaptobenzothiazole.
Claim 16
Dependent Claim
12 words
The composition of claim 12, wherein the polyhydric alcohol is ethylene glycol.
Claim 17
Dependent Claim
15 words
The composition of claim 12, wherein the alkali metal antimony tartrate is potassium antimony tartrate.
Claim 18
Dependent Claim
35 words
The composition of claim 12, wherein the alkali metal antimony tartrate is present in an amount between about 0.01 wt.% to about 1 wt.%, based on K(SbO)C 4 H 4 O 6 .1/2H 2 O.
Claim 19
Dependent Claim
36 words
The composition of claim 12, wherein the alkali metal antimony tartrate is present in an amount between about 0.05 wt.% to about 0.5 wt.% based on K(SbO)C 4 H 4 O 6 .1/2 H 2 O.
Claim 20
Dependent Claim
31 words
The composition of claim 12, wherein the alkali metal antimony tartrate is present in an amount at about 0.1 wt.%, based on K(SbO)C 4 H 4 O 6 .1/2H 2 O.
Claim 21
Dependent Claim
25 words
The composition of claim 12 additionally comprising a metal surface corrosion inhibitor other than alkali metal antimony tartrate and azole in a corrosion inhibitory amount.
Claim 22
Dependent Claim
18 words
The composition of claim 19 wherein the additional metal surface corrosion inhibitor inhibits corrosion with respect to aluminum.
Claim 23
Dependent Claim
19 words
The composition of claim 19 wherein the additional metal surface corrosion inhibitor inhibits corrosion with respect to ferrous metals.
Claim 24
Dependent Claim
15 words
The composition of claim 19 wherein the additional metal surface corrosion inhibitor is a silicate.
Claim 25
Dependent Claim
15 words
The composition of claim 19 wherein the additional metal surface corrosion inhibitor is a borate.
Claim 26
Independent Claim
75 words
A method for inhibiting corrosion on metal surfaces in a coolant system which comprises adding to the coolant system a concentrate comprising (a) a liquid polyhydric alcohol chosen from the group consisting of ethylene glycol, propylene glycol, diethylene glycol and mixtures thereof, and (b) an alkali metal antimony tartrate in a corrosion inhibitory amount with respect to corrosion of lead-containing solders, to provide a coolant solution, and circulating the coolant solution through the cooling system.
Claim 27
Independent Claim
75 words
A method for inhibiting corrosion on metal surfaces in a coolant system which comprises adding to the coolant system a concentrate comprising (a) a liquid polyhydric alcohol chosen from the group consisting of ethylene glycol, propylene glycol, diethylene glycol and mixtures thereof, and (b) an alkali metal antimony tartrate in a corrosion inhibitory amount with respect to corrosion of lead-containing solders, to provide a coolant solution, and circulating the coolant solution through the cooling system.
Claim 28
Dependent Claim
21 words
The method of claim 24 which additionally comprises adding water to the concentrate before adding the concentrate to the cooling system.
Claim 29
Dependent Claim
21 words
The method of claim 24 which additionally comprises adding water to the concentrate after adding the concentrate to the cooling system.
Claim 30
Independent Claim
88 words
A method for inhibiting corrosion on metal surfaces in a coolant system which comprises adding to the coolant system a concentrate comprising (a) a liquid, polyhydric alcohol chosen from the group consisting of ethylene glycol, propylene glycol, diethylene glycol and mixtures thereof, and (b) a corrosion inhibitor in a corrosion inhibitory amount with respect to corrosion of lead-containing solders, the corrosion inhibitor comprising (i) an alkali metal antimony tartrate, and (ii) an azole compound, to provide a coolant solution, and circulating the coolant solution through the cooling system.
Claim 31
Independent Claim
88 words
A method for inhibiting corrosion on metal surfaces in a coolant system which comprises adding to the coolant system a concentrate comprising (a) a liquid, polyhydric alcohol chosen from the group consisting of ethylene glycol, propylene glycol, diethylene glycol and mixtures thereof, and (b) a corrosion inhibitor in a corrosion inhibitory amount with respect to corrosion of lead-containing solders, the corrosion inhibitor comprising (i) an alkali metal antimony tartrate, and (ii) an azole compound, to provide a coolant solution, and circulating the coolant solution through the cooling system.
Claim 32
Dependent Claim
21 words
The method of claim 27 which additionally comprises adding water to the concentrate before adding the concentrate to the cooling system.
Claim 33
Dependent Claim
21 words
The method of claim 27 which additionally comprises adding water to the concentrate after adding the concentrate to the cooling system.
Claim 34
Independent Claim
51 words
A method for producing a concentrate composition with corrosion inhibitive properties with respect to corrosion on the surfaces of lead containing solder alloys, which comprises dissolving of alkali metal antimony tartrate in a liquid polyhydric alcohol, chosen from the group consisting of ethylene glycol, propylene glycol, diethylene glycol and mixtures thereof.
Claim 35
Independent Claim
51 words
A method for producing a concentrate composition with corrosion inhibitive properties with respect to corrosion on the surfaces of lead containing solder alloys, which comprises dissolving of alkali metal antimony tartrate in a liquid polyhydric alcohol, chosen from the group consisting of ethylene glycol, propylene glycol, diethylene glycol and mixtures thereof.
Claim 36
Independent Claim
53 words
A method for producing concentrate composition with corrosion inhibitive properties with respect to corrosion on the surfaces of lead solder alloys, which comprises dissolving of alkali metal antimony tartrate and an azole compound in a liquid polyhydric alcohol, chosen from the group consisting of ethylene glycol, propylene glycol, diethylene glycol and mixtures thereof.
Claim 37
Independent Claim
53 words
A method for producing concentrate composition with corrosion inhibitive properties with respect to corrosion on the surfaces of lead solder alloys, which comprises dissolving of alkali metal antimony tartrate and an azole compound in a liquid polyhydric alcohol, chosen from the group consisting of ethylene glycol, propylene glycol, diethylene glycol and mixtures thereof.
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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) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |