Patent US4855624A successfully refreshed from Google Patents.
Patent US5254380A successfully refreshed from Google Patents.
US5254380A
Expired / Lapsed
US
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Dry powder mixes comprising phase change materials
Assignee: University of Dayton
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Filing: 1993-03-17
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Granted: 1993-10-19
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Expires: 2013-03-17
Abstract
Abstract Free flowing, conformable powder-like mix of silica particles and a phase change material (p.c.m.) is disclosed. The silica particles have a critical size of about 7x10-3 to about 7x10-2 microns and the pcm must be added to the silica in an amount of 80 wt. % or less pcm per combined weight of silica and pcm. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garmets, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a pcm material. The silica-pcm mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub.
Inventors
- 👤 Ival O. Salyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:37
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/20; A01G13/27; A47; A47G; A47G9/00; A47G9/02; A47G9/0207; A47G9/0215; A61; A61F; A61F7/00; A61F7/02; A61L; A61L24/00; A61L24/02; A61L26/00; A61L26/0004; C; C08; C08K; C08K3/00; C08K3/34; C08K3/36; C08K5/00; C08K5/01; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063; F; F16; F16D; F16D65/00; F16D65/78; F16D66/00; F16D69/00; F16D69/02; F28; F28D; F28D20/00; F28D20/02; F28D20/023; H; H05; H05K; H05K5/00; H05K5/02; H05K5/0209; H05K5/0213; A61F2007/0225; A61F2007/0233; A61F2007/0238; A61F2007/0242; A61F2007/0261; A61F2007/0268; F16D2065/781; Y; Y02; Y02E; Y02E60/00; Y02E60/14; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362; Y10T428/1366; Y10T428/1372; Y10T428/1397; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
160 words
A food receptacle or beverage container receptacle comprising a housing, and a powder-like mix consisting essentially of a phase change material and finely divided silica particles, in combination, disposed in said housing, said silica particles having particle sizes of about 7×10 -3 to about 7×10 -2 microns, said phase change material being selected from the group consisting of water, glycerine, ethylene glycol, crystalline alkyl hydrocarbons having a carbon chain length of C 14 and greater, crystalline fatty acids, crystalline fatty acid esters, crystalline alicyclic hydrocarbons, crystalline aromatic compounds, hydrated salts, clathrates, semi-clathrates, gas clathrates, polyethylene glycol, and halogen-terminated alkyl hydrocarbons, said phase change material having a melting and freezing point of from about -20° to about 80° C. and being present in an amount of 80% or less by weight and said silica particles being present in an amount of 20% or more by weight based on the total weight of the combination of phase change material and silica particles.
Claim 2
Dependent Claim
160 words
A food receptacle or beverage container receptacle comprising a housing, and a powder-like mix consisting essentially of a phase change material and finely divided silica particles, in combination, disposed in said housing, said silica particles having particle sizes of about 7×10 -3 to about 7×10 -2 microns, said phase change material being selected from the group consisting of water, glycerine, ethylene glycol, crystalline alkyl hydrocarbons having a carbon chain length of C 14 and greater, crystalline fatty acids, crystalline fatty acid esters, crystalline alicyclic hydrocarbons, crystalline aromatic compounds, hydrated salts, clathrates, semi-clathrates, gas clathrates, polyethylene glycol, and halogen-terminated alkyl hydrocarbons, said phase change material having a melting and freezing point of from about -20° to about 80° C. and being present in an amount of 80% or less by weight and said silica particles being present in an amount of 20% or more by weight based on the total weight of the combination of phase change material and silica particles.
Claim 3
Dependent Claim
33 words
A food receptacle or beverage container receptacle as recited in claim 1 wherein said silica particles have a surface area of between about 50 m 2 /g to about 500 m 2 /g.
Claim 4
Dependent Claim
27 words
A food receptacle or beverage container receptacle as recited in claim 1 wherein said silica particles are selected from the group consisting of fumed and precipitated silicas.
Claim 5
Dependent Claim
25 words
A food receptacle or beverage container receptacle as recited in claim 1 wherein said silica particles are hydrophilic precipitated silica particles or hydrophobic silica particles.
Claim 6
Dependent Claim
40 words
A food receptacle or beverage container receptacle as recited in claim 1 wherein said phase change material is present in an amount of 50-80 wt. % based upon the combined weight of said phase change material and said silica particles.
Claim 7
Dependent Claim
51 words
A food receptacle or beverage container receptacle as recited in claim 1 further comprising a polar compound present in an amount of 5-25 wt. % based on the total weight of said silica, said phase change material and said polar compound, and wherein said receptacle may be heating by microwave energy.
Claim 8
Dependent Claim
34 words
A food receptacle or beverage container receptacle as recited in claim 1 wherein said phase change material comprises a polar phase change material compound and wherein said receptacle may be heated by microwave energy.
Claim 9
Dependent Claim
47 words
A food receptacle or beverage container receptacle as recited in claim 7 wherein said polar phase change material is chosen from the group consisting of water, glycerine, ethylene glycol, polyethylene glycol having a molecular weight of about 1,000 or greater, clathrates, semi-clathrates, gas clathrates, and hydrated salts.
Claim 10
Dependent Claim
19 words
A food receptacle or beverage container receptacle as recited in claim 1 wherein said phase change material is water.
Claim 11
Dependent Claim
32 words
A food receptacle or beverage container receptacle as recited in claim 1 wherein said phase change material comprises a crystalline alkyl hydrocarbon having a carbon chain length of C 14 and greater.
References Cited (Backward Citations)
US3823089A
Cited
US3603106A
Cited
US3639189A
Cited
US4045515A
Cited
US4259198A
Cited
US4003426A
Cited
US4008170A
Cited
US4259401A
Cited
FR2368529A1
Cited
US4182398A
Cited
US4294078A
Cited
US4253983A
Cited
US4233960A
Cited
JPS5442380A
Cited
US4273667A
Cited
EP0022717A1
Cited
US4367788A
Cited
US4463799A
Cited
DE3045842A1
Cited
US4470917A
Cited
US4545916A
Cited
JPS59142276A
Cited
US4505953A
Cited
JPS59170180A
Cited
US4504402A
Cited
US4513053A
Cited
JPS59232164A
Cited
JPS6086191A
Cited
JPS6086188A
Cited
US4561989A
Cited
US4567877A
Cited
US4711813A
Cited
US5052369A
Cited
US4715978A
Cited
US4777931A
Cited
US4983798A
Cited
US4982722A
Cited
US5211949A
Cited
US5125391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-10-18 | 1997-04-19 | 1997-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-18 | 2001-04-19 | 2001-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-18 | 2005-04-19 | 2005-10-19 | $7700.00 | Window Closed / Lapsed |