US4272390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrated CaCl2 reversible phase change compositions with nucleating additives
Assignee: Dow Chemical Co
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Filing: 1979-11-02
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Granted: 1981-06-09
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Expires: 1999-11-02
Abstract
Abstract A reversible liquid solid phase change composition comprising hydrated CaCl 2 , and one of the group of BaI 2 , BaSO 4 , and/or BaO, added to the composition in an effective amount to suppress supercooling of the CaCl 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 20:40
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
46 words
A reversible liquid/solid phase change composition comprising hydrated CaCl 2 , and as a nucleating additive, one or more of BaI 2 , BaSO 4 , or BaO, added to the composition in an amount effective to suppress supercooling of the hydrated CaCl 2 liquid phase.
Claim 2
Dependent Claim
46 words
A reversible liquid/solid phase change composition comprising hydrated CaCl 2 , and as a nucleating additive, one or more of BaI 2 , BaSO 4 , or BaO, added to the composition in an amount effective to suppress supercooling of the hydrated CaCl 2 liquid phase.
Claim 3
Dependent Claim
44 words
The composition of claim 1 contained within encapsulating means and having added thereto an amount of one or more of the additives of the defined group effective to suppress average supercooling of the hydrated CaCl 2 liquid phase to about 2° C. or less.
Claim 4
Dependent Claim
12 words
The composition of claim 2 wherein the additive comprises BaI 2 .
Claim 5
Dependent Claim
12 words
The composition of claim 2 wherein the additive comprises BaSO 4 .
Claim 6
Dependent Claim
10 words
The composition of claim 2 wherein the additive comprises BaO.
Claim 7
Independent Claim
48 words
A method of preparing a hydrated CaCl 2 of suppressed supercooling properties, comprising admixing uniformly in such composition as a nucleating additive, one or more of BaI 2 , BaSO 4 , or BaO, in an amount effective to suppress supercooling of the hydrated CaCl 2 liquid phase.
Claim 8
Independent Claim
48 words
A method of preparing a hydrated CaCl 2 of suppressed supercooling properties, comprising admixing uniformly in such composition as a nucleating additive, one or more of BaI 2 , BaSO 4 , or BaO, in an amount effective to suppress supercooling of the hydrated CaCl 2 liquid phase.
Claim 9
Dependent Claim
36 words
The method of claim 6 wherein an effective amount of one or more of the defined group is added to suppress average supercooling of the hydrated CaCl 2 liquid phase to about 2° C. or less.
Claim 10
Dependent Claim
11 words
The method of claim 6 using the additive BaI 2 .
Claim 11
Dependent Claim
11 words
The method of claim 6 using the additive BaSO 4 .
Claim 12
Dependent Claim
9 words
The method of claim 6 using the additive BaO.
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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) | 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 |