Patent US1226191A successfully refreshed from Google Patents.
US5307641A
Expired / Lapsed
US
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Method and apparatus for producing ice by direct contact of a non-hydrate producing refrigerant with water
Assignee: Chicago Bridge and Iron Co
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Filing: 1993-01-06
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Granted: 1994-05-03
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Expires: 2013-01-06
Abstract
Abstract A method comprising feeding a liquefied refrigerant selected from the group consisting of 1,1,1,2,3,3,3-heptafluoropropane; 1,1,1,2,2,3,3-heptafluoropropane; 1,1,1,2,2,3-hexafluoropropane; 1,1,1,3,3,3-hexafluoropropane; perfluorobutane; and octafluoropropane into direct contact with a volume of aqueous liquid in an enclosed ice making vessel to convert part of the aqueous liquid to ice crystals, without the formation of a water-refrigerant hydrate, by vaporizing the refrigerant by heat exchange with the aqueous liquid.
Inventors
- 👤 Richard J. Kooy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:26
CPC Classifications
F; F25; F25D; F25D16/00; F25C; F25C1/00; F25D17/00; F25D17/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
62 words
A method comprising: feeding a liquefied refrigerant selected from the group consisting of: 1,1,1,2,3,3,3-heptafluoropropane 1,1,1,2,2,3,3-heptafluoropropane 1,1,1,2,2,3-hexafluoropropane 1,1,1,3,3,3-hexafluoropropane Octafluoropropane into direct contact with a volume of aqueous liquid in an enclosed ice making vessel to convert part of the aqueous liquid to ice crystals, without the formation of a water. refrigerant hydrate, by vaporizing the refrigerant by heat exchange with the aqueous liquid.
Claim 2
Independent Claim
62 words
A method comprising: feeding a liquefied refrigerant selected from the group consisting of: 1,1,1,2,3,3,3-heptafluoropropane 1,1,1,2,2,3,3-heptafluoropropane 1,1,1,2,2,3-hexafluoropropane 1,1,1,3,3,3-hexafluoropropane Octafluoropropane into direct contact with a volume of aqueous liquid in an enclosed ice making vessel to convert part of the aqueous liquid to ice crystals, without the formation of a water. refrigerant hydrate, by vaporizing the refrigerant by heat exchange with the aqueous liquid.
Claim 3
Independent Claim
39 words
A method according to claim I in which the vaporized refrigerant is separated from the aqueous liquid containing ice crystals, the refrigerant vapor is reliquefied, and the liquefied refrigerant is again fed to a volume of the aqueous liquid.
Claim 4
Dependent Claim
12 words
A method according to claim 1 in which: the refrigerant is 1,1,1,2,3,3,3-heptafluoropropane.
Claim 5
Dependent Claim
12 words
A method according to claim 1 in which: the refrigerant is 1,1,1,2,2,3,3-heptafluoropropane.
Claim 6
Dependent Claim
12 words
A method according to claim 1 in which: the refrigerant is 1,1,1,2,2,3-hexafluoropropane.
Claim 7
Dependent Claim
12 words
A method according to claim 1 in which: the refrigerant is 1,1,1,3,3,3-hexafluoropropane.
Claim 8
Dependent Claim
12 words
A method according to claim 1 in which: the refrigerant is octafluoropropane.
Claim 9
Independent Claim
111 words
A method comprising: feeding a liquefied refrigerant selected from the group consisting of: 1,1,1,2,3,3,3-heptafluoropropane 1,1,1,2,2,3,3-heptafluoropropane 1,1,1,2,2,3-hexafluoropropane 1,1,1,3,3,3-hexafluoropropane Octafluoropropane into direct contact with a volume of aqueous liquid in an enclosed ice making vessel to convert part of the aqueous liquid to ice crystals and vaporize the refrigerant by heat exchange with the aqueous liquid; separating a mixture of aqueous liquid and ice crystals from the refrigerant vapor and feeding said mixture to a tank; converting the refrigerant vapor to liquid refrigerant in a refrigeration cycle and feeding the liquid refrigerant back to the ice making vessel; and withdrawing aqueous liquid from the tank and feeding it to the ice making vessel.
Claim 10
Independent Claim
111 words
A method comprising: feeding a liquefied refrigerant selected from the group consisting of: 1,1,1,2,3,3,3-heptafluoropropane 1,1,1,2,2,3,3-heptafluoropropane 1,1,1,2,2,3-hexafluoropropane 1,1,1,3,3,3-hexafluoropropane Octafluoropropane into direct contact with a volume of aqueous liquid in an enclosed ice making vessel to convert part of the aqueous liquid to ice crystals and vaporize the refrigerant by heat exchange with the aqueous liquid; separating a mixture of aqueous liquid and ice crystals from the refrigerant vapor and feeding said mixture to a tank; converting the refrigerant vapor to liquid refrigerant in a refrigeration cycle and feeding the liquid refrigerant back to the ice making vessel; and withdrawing aqueous liquid from the tank and feeding it to the ice making vessel.
Claim 11
Dependent Claim
12 words
A method according to claim 8 in which: the refrigerant is 1,1,1,2,3,3,3-heptafluoropropane.
Claim 12
Dependent Claim
12 words
A method according to claim 8 in which: the refrigerant is 1,1,1,2,2,3,3-heptafluoropropane.
Claim 13
Dependent Claim
12 words
A method according to claim 8 in which: the refrigerant is 1,1,1,2,2,3-heptafluoropropane.
Claim 14
Dependent Claim
12 words
A method according to claim 8 in which: the refrigerant is 1,1,1,3,3,3-heptafluoropropane.
Claim 15
Dependent Claim
12 words
A method according to claim 8 in which: the refrigerant is octafluoropropane.
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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) | 1997-05-02 | 1997-11-01 | 1998-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-02 | 2001-11-01 | 2002-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-02 | 2005-11-01 | 2006-05-03 | $7700.00 | Window Closed / Lapsed |