Patent US4338208A successfully refreshed from Google Patents.
US4338208A
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Hydrated MgCl2 reversible phase change compositions
Assignee: Dow Chemical Co
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Filing: 1980-12-22
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Granted: 1982-07-06
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Expires: 2000-12-22
Abstract
Abstract A reversible liquid/solid phase change composition comprising hydrated MgCl 2 and one or more of Ba(OH) 2 , Sr(OH) 2 , CaO, SrCO 3 , BaO, Ca(OH) 2 , Mg(OH) 2 , MgO, Na 3 AlF 6 or CaC 2 O 4 , added to the composition in an effective amount to suppress supercooling of the MgCl 2 liquid phase.
Inventors
- 👤 George A. Lane
- 👤 Harold E. Rossow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:46
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
59 words
A reversible liquid/solid phase change composition comprising hydrated MgCl 2 and as a nuclearing additive, one or more of the group of CaO, Ca(OH) 2 , Mg(OH) 2 , MgO or CaC 2 O 4 added to the composition in an amount effective to suppress average supercooling of the MgCl 2 liquid phase to about 2° C. or less.
Claim 2
Dependent Claim
59 words
A reversible liquid/solid phase change composition comprising hydrated MgCl 2 and as a nuclearing additive, one or more of the group of CaO, Ca(OH) 2 , Mg(OH) 2 , MgO or CaC 2 O 4 added to the composition in an amount effective to suppress average supercooling of the MgCl 2 liquid phase to about 2° C. or less.
Claim 3
Dependent Claim
27 words
The composition of claim 1, wherein the hydrated MgCl 2 consists of about 46 weight percent MgCl 2 and the balance is water to 100 weight percent.
Claim 4
Dependent Claim
10 words
The composition of claim 1 hermetically contained within encapsulating means.
Claim 5
Dependent Claim
18 words
The composition of claim 1 comprising not greater than about 2.0 weight percent CaO as a nucleating additive.
Claim 6
Dependent Claim
19 words
The composition of claim 1 comprising not greater than about 2.0 weight percent Ca(OH) 2 as a nucleating additive.
Claim 7
Dependent Claim
19 words
The composition of claim 1 comprising not greater than about 2.0 weight percent Mg(OH) 2 as a nucleating additive.
Claim 8
Dependent Claim
18 words
The composition of claim 1 comprising not greater than about 2.0 weight percent MgO as a nucleating additive.
Claim 9
Dependent Claim
21 words
The composition of claim 1 comprising not greater than about 2.0 weight percent CaC 2 O 4 as a nucleating additive.
Claim 10
Independent Claim
56 words
A method of preparing a hydrated MgCl 2 composition of suppressed supercooling properties, comprising admixing uniformly in such composition, one or more of CaO, Ca(OH) 2 , Mg(OH) 2 , MgO or CaC 2 O 4 in an amount effective to suppress average supercooling of the MgCl 2 liquid phase to about 2° C. or less.
Claim 11
Independent Claim
56 words
A method of preparing a hydrated MgCl 2 composition of suppressed supercooling properties, comprising admixing uniformly in such composition, one or more of CaO, Ca(OH) 2 , Mg(OH) 2 , MgO or CaC 2 O 4 in an amount effective to suppress average supercooling of the MgCl 2 liquid phase to about 2° C. or less.
Claim 12
Dependent Claim
27 words
The method of claim 9, wherein the hydrated MgCl 2 consists of about 46 weight percent MgCl 2 and the balance is water to 100 weight percent.
Claim 13
Dependent Claim
9 words
The method of claim 9 using the additive CaO.
Claim 14
Dependent Claim
11 words
The method of claim 9 using the additive Ca(OH) 2 .
Claim 15
Dependent Claim
11 words
The method of claim 9 using the additive Mg(OH) 2 .
Claim 16
Dependent Claim
9 words
The method of claim 9 using the additive MgO.
Claim 17
Dependent Claim
13 words
The method of claim 9 using the additive CaC 2 O 4 .
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JPS5592782A
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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) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |