US4288338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static solar heat storage composition
Assignee: Individual
•
Filing: 1980-03-17
•
Granted: 1981-09-08
•
Expires: 2000-03-17
Abstract
Abstract A composition for the storage of heat energy utilizing the heat of fusion of the composition. The composition includes a salt-hydrate, a nucleating agent and a porous solid. The porous solid is selected from calcium sulfate hemihydrate and soluble calcium sulfate anhydride.
Inventors
- 👤 Hugh J. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:49
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063; Y; Y10; Y10S; Y10S165/00; Y10S165/902
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
A composition for the storage of heat energy utilizing the heat of fusion of the composition, said composition comprising a salt-hydrate having a heat of fusion of more than about 50 BTU per pound, a nucleating agent and a porous solid selected from the group consisting of calcium sulfate hemihydrate and soluble calcium sulfate anhydride at a level from about 15 to about 75 percent by weight based on the weight of the salt portion of said salt-hydrate.
Claim 2
Dependent Claim
78 words
A composition for the storage of heat energy utilizing the heat of fusion of the composition, said composition comprising a salt-hydrate having a heat of fusion of more than about 50 BTU per pound, a nucleating agent and a porous solid selected from the group consisting of calcium sulfate hemihydrate and soluble calcium sulfate anhydride at a level from about 15 to about 75 percent by weight based on the weight of the salt portion of said salt-hydrate.
Claim 3
Dependent Claim
36 words
A composition in accordance with claim 1 wherein said salt-hydrate is selected from the group consisting of sodium sulfate decahydrate, sodium thiosulfate pentahydrate, sodium carbonate decahydrate, disodium phosphate dodecahydrate, calcium chloride hexahydrate and calcium nitrate tetrahydrate.
Claim 4
Dependent Claim
34 words
A composition in accordance with claim 1 wherein said nucleating agent is present at a level of from about 4 to about 20 percent by weight based on the salt portion of said salt-hydrate.
Claim 5
Dependent Claim
13 words
A composition in accordance with claim 1 wherein said nucleating agent is borax.
Claim 6
Dependent Claim
37 words
A composition in accordance with claim 4 wherein said borax is present at a level of from about 5 to about 10 percent by weight based on the weight of the salt portion of said salt hydrate.
Claim 7
Independent Claim
81 words
A method of preparing a composition for the storage of heat energy comprising the steps of forming a blend of a salt hydrate, a porous solid selected from the group consisting of calcium sulfate hemihydrate and soluble calcium sulfate anhydride at a level of from about 15 to about 75 percent by weight based on the weight of the salt portion of said salt-hydrate, and a nucleating agent, mixing water with said blend and agitating said blend until said blend solidifies.
Claim 8
Independent Claim
81 words
A method of preparing a composition for the storage of heat energy comprising the steps of forming a blend of a salt hydrate, a porous solid selected from the group consisting of calcium sulfate hemihydrate and soluble calcium sulfate anhydride at a level of from about 15 to about 75 percent by weight based on the weight of the salt portion of said salt-hydrate, and a nucleating agent, mixing water with said blend and agitating said blend until said blend solidifies.
Claim 9
Dependent Claim
36 words
A method in accordance with claim 6 wherein said salt-hydrate is selected from the group consisting of sodium sulfate decahydrate, sodium thiosulfate pentahydrate, sodium carbonate decahydrate, disodium phosphate dodecahydrate, calcium chloride hexahydrate and calcium nitrate tetrahydrate.
Claim 10
Dependent Claim
34 words
A method in accordance with claim 6 wherein said nucleating agent is present at a level of from about 4 to about 20 percent by weight based on the salt portion of said salt-hydrate.
Claim 11
Dependent Claim
13 words
A method in accordance with claim 6 wherein said nucleating agent is borax.
Claim 12
Dependent Claim
36 words
A method in accordance with claim 9 wherein said borax is present at a level from about 5 to about 10 percent by weight based on the weight of the salt portion of said salt hydrate.
References Cited (Backward Citations)
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US2706716A
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US2827438A
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US4091863A
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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) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |