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US4715978A Expired / Lapsed US ⏱️ 0.0 years remaining

Heat storage composition, latent heat storage capsules containing said heat-storage composition and temperature control apparatus using said capsules

Assignee: Kubota Corp
•
Filing: 1986-04-10
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Granted: 1987-12-29
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Expires: 2006-04-10
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Abstract

Abstract A heat storage composition excellent in heat storing effect contains calcium chloride hexahydrate as the main component and an appropriate amount of a nucleating agent combination for inhibiting supercooling which is composed of barium sulfide, barium chloride dihydrate and strontium chloride hexahydrate or of barium chloride dihydrate and strontium chloride hexahydrate and optionally contains an appropriate amount of a thickening agent combination composed of an ultrafine silica powder and glycerin. Latent heat storage capsules contain the above heat storage composition and are improved particularly in their structure such that improved heat storage and release effects can be produced. A temperature control apparatus can make most of the heat storage capsules in the temperature control of a hothouse or the like.

Inventors

  • 👤 Naomichi Yano
  • 👤 Tadatsugu Ueno
  • 👤 Shigeru Tsuboi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 20:56
CPC Classifications
F; F28; F28D; F28D20/00; F28D20/02; F28D20/023; C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063; Y; Y02; Y02E; Y02E60/00; Y02E60/14

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 59 words
A heat storage composition containing calcium chloride hexahydrate as the main component, which contains, as nucleating agents for preventing supercooling, 0-5 percent by weight (on the whole heat storage composition basis) of barium sulfide, 0.001-5 percent by weight (on the same basis) of barium chloride dihydrate and 0.001-0.1 percent by weight (on the same basis) of strontium chloride hexahydrate.
Claim 2
Dependent Claim 59 words
A heat storage composition containing calcium chloride hexahydrate as the main component, which contains, as nucleating agents for preventing supercooling, 0-5 percent by weight (on the whole heat storage composition basis) of barium sulfide, 0.001-5 percent by weight (on the same basis) of barium chloride dihydrate and 0.001-0.1 percent by weight (on the same basis) of strontium chloride hexahydrate.
Claim 3
Dependent Claim 51 words
The heat storage composition of claim 1, wherein the barium sulfide content (X percent), barium chloride dihydrate content (Y percent) and strontium chloride hexahydrate content (Z percent) further satisfy the following conditions: when 0.06≦Z≦0.1, then X=0 and Y≧0.5, when 0.005≦Z≦0.06, then X≧0.0001 and Y≧0.01, or when 0.001≦Z≦0.005, then X≧0.001 and Y≧0.01.
Claim 4
Dependent Claim 34 words
The heat storage composition of claim 1 or 2, which further contains at least one bromide selected from the group consisting of potassium bromide, sodium bromide and ammonium bromide as a solidification point modifier.
Claim 5
Dependent Claim 21 words
The heat storage composition of claim 1, 2 or 3, which additionally contains ultrafine silica powder and glycerin as thickening agents.
Claim 6
Dependent Claim 32 words
The heat storage composition of claim 4, wherein the ultrafine silica powder is present in an amount of 1.5-6 percent by weight and glycerin in an amount of 1-5 percent by weight.

References Cited (Backward Citations)

FR2396061A1 Cited
JPS57153074A Cited
JPS57180684A Cited
US4540502A Cited
US4637888A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-12-28 1991-06-29 1991-12-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-12-28 1995-06-29 1995-12-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-12-28 1999-06-29 1999-12-29 $7700.00 Window Closed / Lapsed

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