US4272392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrated Mg(NO3)2 /MgCl2 reversible phase change compositions
Assignee: Dow Chemical Co
•
Filing: 1979-11-02
•
Granted: 1981-06-09
•
Expires: 1999-11-02
Abstract
Abstract A reversible liquid solid phase change composition comprising hydrated Mg(NO 3 ) 2 /MgCl 2 , and one of the group of MgO, Mg(OH) 2 , and/or NaBO 2 , added to the composition in an effective amount to suppress super-cooling of the Mg(NO 3 ) 2 /MgCl 2 liquid phase.
Inventors
- 👤 George A. Lane
- 👤 Harold E. Rossow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:36
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063; Y; Y10; Y10S; Y10S165/00; Y10S165/902
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
59 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 MgO, Mg(OH) 2 , or NaBO 2 , 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
59 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 MgO, Mg(OH) 2 , or NaBO 2 , 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
17 words
The composition of claim 1 wherein the additive comprises not greater than about 2.0 weight percent MgO.
Claim 6
Dependent Claim
19 words
The composition of claim 1 wherein the additive comprises not more than about 2.0 weight percent Mg(OH) 2 .
Claim 7
Dependent Claim
19 words
The composition of claim 1 wherein the additive comprises not greater than about 2.0 weight percent NaBO 2 .
Claim 8
Independent Claim
59 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 MgO, Mg(OH) 2 , or NaBO 2 , 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
Independent Claim
59 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 MgO, Mg(OH) 2 , or NaBO 2 , 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 10
Dependent Claim
40 words
The method of claim 7, 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 11
Dependent Claim
9 words
The method of claim 7 using the additive MgO.
Claim 12
Dependent Claim
11 words
The method of claim 7 using the additive Mg(OH) 2 .
Claim 13
Dependent Claim
11 words
The method of claim 7 using the additive NaBO 2 .
References Cited (Backward Citations)
US2677664A
Cited
US2856506A
Cited
US2706716A
Cited
US3536059A
Cited
US3720198A
Cited
DE2550106A1
Cited
US4003426A
Cited
US3973552A
Cited
SU568669A1
Cited
US4109702A
Cited
US4117882A
Cited
FR2396061B1
Cited
GB2001096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-08 | 1992-12-08 | 1993-06-09 | $7700.00 | Window Closed / Lapsed |