US4250720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable non-cyclic sorption temperature-changers
Assignee: Individual
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Filing: 1979-03-12
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Granted: 1981-02-17
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Expires: 1999-03-12
Abstract
Abstract The invention consists of disposable temperature changing devices which can be stored for unlimited periods without losing their temperature changing potential. Water boiling in an air-evacuated chamber serves as the working liquid. A dessicant in a separate container communicates with the vapor phase of the water, and removes the vapor generated by the boiling water. Unlimited storage of the temperature changing potential of the invention is obtained by the closing of the communication between the containers.
Inventors
- 👤 Israel Siegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:00
CPC Classifications
F; F25; F25B; F25B17/00; F25B17/08; Y; Y02; Y02A; Y02A30/00; Y02A30/27
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
73 words
A disposable cooler consisting of a double-wall container, water in an interspace between said walls, at least a partial vacuum in said interspace to lower the boiling point of said water. a second container, a dessicant in said container, a communication between the containers to allow a sorption of vapors generated by the evaporation of said water, and means to reversibly close said communication to allow an unlimited storage of said disposable cooler.
Claim 2
Dependent Claim
73 words
A disposable cooler consisting of a double-wall container, water in an interspace between said walls, at least a partial vacuum in said interspace to lower the boiling point of said water. a second container, a dessicant in said container, a communication between the containers to allow a sorption of vapors generated by the evaporation of said water, and means to reversibly close said communication to allow an unlimited storage of said disposable cooler.
Claim 3
Dependent Claim
14 words
The invention as described in claim 1 and including means for drying said dessicant.
Claim 4
Dependent Claim
100 words
A temperature changing device consisting of a chamber, a liquid in said chamber, at least a partial air-vacuum in said chamber to lower the boiling temperature of said liquid, a second chamber, a dessicant in said second chamber, said dessicant having an affinity for vapors generated by said liquid, a communication between said vapors and said dessicant, to obtain a sorption of said vapors by said dessicant, at least one of the chambers being spaced between a double wall container, and means to reversibly close said communication to obtain an unlimited storage of the temperature-changing potential of said temperature-changing device.
Claim 5
Dependent Claim
100 words
A temperature changing device consisting of a chamber, a liquid in said chamber, at least a partial air-vacuum in said chamber to lower the boiling temperature of said liquid, a second chamber, a dessicant in said second chamber, said dessicant having an affinity for vapors generated by said liquid, a communication between said vapors and said dessicant, to obtain a sorption of said vapors by said dessicant, at least one of the chambers being spaced between a double wall container, and means to reversibly close said communication to obtain an unlimited storage of the temperature-changing potential of said temperature-changing device.
Claim 6
Dependent Claim
100 words
A temperature changing device consisting of a chamber, a liquid in said chamber, at least a partial air-vacuum in said chamber to lower the boiling temperature of said liquid, a second chamber, a dessicant in said second chamber, said dessicant having an affinity for vapor generated by said liquid, a communication between said vapors and said dessicant, to obtain a sorption of said vapors by said dessicant, means to reversibly close said communication to obtain an unlimited storage of the temperature-changing potential of said temperature-changing device, and a container immersed in said liquid to obtain a cooling of said container.
Claim 7
Dependent Claim
100 words
A temperature changing device consisting of a chamber, a liquid in said chamber, at least a partial air-vacuum in said chamber to lower the boiling temperature of said liquid, a second chamber, a dessicant in said second chamber, said dessicant having an affinity for vapor generated by said liquid, a communication between said vapors and said dessicant, to obtain a sorption of said vapors by said dessicant, means to reversibly close said communication to obtain an unlimited storage of the temperature-changing potential of said temperature-changing device, and a container immersed in said liquid to obtain a cooling of said container.
Claim 8
Dependent Claim
105 words
A temperature changing device consisting of a chamber. a liquid in said chamber, at least a partial air-vacuum in said chamber to lower the boiling temperature of said liquid, a second chamber, a dessicant in said second chamber, said dessicant having an affinity for vapors generated by said liquid, a communication between said vapors and said dessicant, to obtain a sorption of said vapors by said dessicant, means to reversibly close said communication to obtain an unlimited storage of the temperature-changing potential of said temperature-changing device, and electric heating coil means to expel said vapor from said dessicant to obtain a reactivation of said dessicant.
Claim 9
Dependent Claim
105 words
A temperature changing device consisting of a chamber. a liquid in said chamber, at least a partial air-vacuum in said chamber to lower the boiling temperature of said liquid, a second chamber, a dessicant in said second chamber, said dessicant having an affinity for vapors generated by said liquid, a communication between said vapors and said dessicant, to obtain a sorption of said vapors by said dessicant, means to reversibly close said communication to obtain an unlimited storage of the temperature-changing potential of said temperature-changing device, and electric heating coil means to expel said vapor from said dessicant to obtain a reactivation of said dessicant.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |