US4402846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrated Mg(NO3)2 /MgCl2 reversible phase change compositions
Assignee: Dow Chemical Co
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Filing: 1981-10-28
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Granted: 1983-09-06
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Expires: 2001-10-28
Abstract
Abstract A reversible liquid/solid phase change composition comprising hydrated Mg(NO3)2/MgCl2, and one or more of Sr(OH)2, Ca(OH)2, CaO or BaO, added to the composition in an effective amount to suppress supercooling of the Mg(NO3)2/MgCl2 liquid phase.
Inventors
- 👤 George A. Lane
- 👤 Harold E. Rossow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:13
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
56 words
A reversible liquid/solid phase change composition comprising hydrated Mg(NO 3 ) 2 /MgCl 2 and as a nucleating additive, one or more of Sr(OH) 2 , or BaO, added to the composition in an amount effective to suppress average supercooling of the Mg(NO 3 ) 2 /MgCl 2 liquid phase to about 2° C. or less.
Claim 2
Dependent Claim
56 words
A reversible liquid/solid phase change composition comprising hydrated Mg(NO 3 ) 2 /MgCl 2 and as a nucleating additive, one or more of Sr(OH) 2 , or BaO, added to the composition in an amount effective to suppress average supercooling of the Mg(NO 3 ) 2 /MgCl 2 liquid phase to about 2° C. or less.
Claim 3
Dependent Claim
37 words
The composition of claim 1, wherein the hydrated Mg(NO 3 ) 2 /MgCl 2 consists of about 34 weight percent Mg(NO 3 ) 2 and about 19 weight percent MgCl 2 in about 47 weight percent water.
Claim 4
Dependent Claim
10 words
The composition of claim 1 hermetically contained within encapsulating means.
Claim 5
Dependent Claim
19 words
The composition of claim 1 comprising not greater than about 2.0 weight percent Sr(OH) 2 as a nucleating additive.
Claim 6
Dependent Claim
18 words
The composition of claim 1 comprising not greater than about 2.0 weight percent BaO as a nucleating additive.
Claim 7
Independent Claim
56 words
A method of preparing a hydrated Mg(NO 3 ) 2 /MgCl 2 composition of suppressed supercooling properties, comprising admixing uniformly in such composition, one or more of Sr(OH) 2 , or BaO, in an amount effective to suppress average supercooling of the Mg(NO 3 ) 2 /MgCl 2 liquid phase to about 2° C. or less.
Claim 8
Independent Claim
56 words
A method of preparing a hydrated Mg(NO 3 ) 2 /MgCl 2 composition of suppressed supercooling properties, comprising admixing uniformly in such composition, one or more of Sr(OH) 2 , or BaO, in an amount effective to suppress average supercooling of the Mg(NO 3 ) 2 /MgCl 2 liquid phase to about 2° C. or less.
Claim 9
Dependent Claim
40 words
The method of claim 6, wherein the hydrated Mg(NO 3 ) 2 /MgCl 2 mixture is prepared by mixing about 34 weight percent Mg(NO 3 ) 2 and about 19 weight percent MgCl 2 in about 47 weight percent water.
Claim 10
Dependent Claim
11 words
The method of claim 6 using the additive Sr(OH) 2 .
Claim 11
Dependent Claim
9 words
The method of claim 6 using the additive BaO.
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) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |