Patent US4431558A successfully refreshed from Google Patents.
US4431558A
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Heat accumulating material
Assignee: Panasonic Holdings Corp
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Filing: 1982-07-12
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Granted: 1984-02-14
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Expires: 2002-07-12
Abstract
Abstract The heat accumulating material of this invention comprising three components of calcium chloride (CaCl2), urea [CO(NH2)2] and water (H2O) can have varied temperatures of heat accumulating and heat releasing between 15 DEG C. and 29.5 DEG C. by varying the proportion of said three components, and also has a large latent heat. Hence, much expectation can be placed on it as a heat accumulating material for air conditioning. Moreover, by adding BaFeO3-x (0</=x</=0.53) as a nucleating agent to the above-mentioned composition, supercooling can be greatly decreased and wider application of this heat accumulating material becomes possible.
Inventors
- 👤 Takahiro Wada
- 👤 Ryoichi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:12
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
51 words
A heat accumulating material characterized in that CaCl 2 , CO(NH 2 ) 2 and H 2 O are present in a composition of 40-57.5% by weight of CaCl 2 , 30% by weight or less (excluding 0%) of CO(NH 2 ) 2 and 30-52.5% by weight of H 2 O.
Claim 2
Dependent Claim
51 words
A heat accumulating material characterized in that CaCl 2 , CO(NH 2 ) 2 and H 2 O are present in a composition of 40-57.5% by weight of CaCl 2 , 30% by weight or less (excluding 0%) of CO(NH 2 ) 2 and 30-52.5% by weight of H 2 O.
Claim 3
Dependent Claim
61 words
The heat accumulating material according to claim 1, characterized in that CaCl 2 , CO(NH 2 ) 2 and H 2 O are present in a composition having CaCl 2 .6H 2 O and CaCl 2 .4CO(NH 2 )2.2H 2 O as its two end components and containing 25% by weight or less (excluding 0%) of CO(NH 2 ) 2 .
Claim 4
Dependent Claim
31 words
A heat accumulating material according to claim 1, characterized in that BaFeO 3-x (0≦x≦0.53) is added to a composition comprising CaCl 2 , CO(NH 2 ) 2 and H 2 O.
Claim 5
Dependent Claim
49 words
The heat accumulating material according to claim 3, characterized in that the BaFeO 3-x (0≦x≦0.53) is added in a range of 40 parts by weight or less (excluding 0 parts) to 100 parts by weight of the composition comprising CaCl 2 , CO(NH 2 )2 and H 2 O.
References Cited (Backward Citations)
SE7801037L
Cited
JPS55149373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |