US4360442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene carbonate as a phase-change heat storage medium
Assignee: Union Carbide Corp
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Filing: 1981-10-14
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Granted: 1982-11-23
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Expires: 2001-10-14
Abstract
Abstract Ethylene carbonate is used as a heat storage medium in a process for the storage of heat wherein the medium changes phase during the release and absorption of heat.
Inventors
- 👤 James D. Reedy
- 👤 Daniel Pittner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:02
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; Y; Y10; Y10S; Y10S165/00; Y10S165/902
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 words
In a process for the storage of heat comprising heat transfer to and from a heat storage medium wherein the heat storage medium changes phase as it absorbs or releases heat, the improvement comprising the use of ethylene carbonate containing hexamethylcyclotrisiloxane as the heat storage medium.
Claim 2
Dependent Claim
46 words
In a process for the storage of heat comprising heat transfer to and from a heat storage medium wherein the heat storage medium changes phase as it absorbs or releases heat, the improvement comprising the use of ethylene carbonate containing hexamethylcyclotrisiloxane as the heat storage medium.
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein the ethylene carbonate contains from 0.001 to 10 weight percent, based on the total composition, of hexamethylcyclotrisiloxane which minimizes supercooling of the ethylene carbonate as it cools.
Claim 4
Dependent Claim
22 words
The process of claim 2 wherein the ethylene carbonate contains 0.01 to 1 weight percent, based on the total composition, of hexamethylcyclotrisiloxane.
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) | 1985-11-22 | 1986-05-24 | 1986-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-22 | 1990-05-24 | 1990-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-22 | 1994-05-24 | 1994-11-23 | $7700.00 | Window Closed / Lapsed |