Patent US4465610A successfully refreshed from Google Patents.
US4465610A
Expired / Lapsed
US
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Working fluids for rankine cycle
Assignee: Daikin Industries Ltd
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Filing: 1982-12-28
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Granted: 1984-08-14
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Expires: 2002-12-28
Abstract
Abstract Compositions using for working fluids and heat-transfer media comprising 81 to 100 parts by weight of 2,2,3,3,3-pentafluoropropanol and 0 to 19 parts by weight of water.
Inventors
- 👤 Naonori Enjo
- 👤 Hideki Aomi
- 👤 Masahiro Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:49
CPC Classifications
F; F01; F01K; F01K25/00; F01K25/08; C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/047
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
27 words
Aqueous working fluids for use with a Rankine cycle comprising at least 81 parts by weight of 2,2,3,3,3-pentafluoropropanol and up to 19 parts by weight of water.
Claim 2
Dependent Claim
27 words
Aqueous working fluids for use with a Rankine cycle comprising at least 81 parts by weight of 2,2,3,3,3-pentafluoropropanol and up to 19 parts by weight of water.
Claim 3
Dependent Claim
21 words
Aqueous heat-transfer media comprising at least 90 parts by weight of 2,2,3,3,3-pentafluoropropanol and up to 10 parts by weight of water.
Claim 4
Dependent Claim
21 words
Aqueous heat-transfer media comprising at least 90 parts by weight of 2,2,3,3,3-pentafluoropropanol and up to 10 parts by weight of water.
Claim 5
Dependent Claim
17 words
An azeotropic composition comprising 94.0 parts by weight of 2,2,3,3,3-pentafluoropropanol and 6.0 parts by weight of water.
Claim 6
Dependent Claim
17 words
An azeotropic composition comprising 94.0 parts by weight of 2,2,3,3,3-pentafluoropropanol and 6.0 parts by weight of water.
Claim 7
Dependent Claim
28 words
In the operation of a Rankine cycle wherein a working fluid is employed, the improvement which comprises using as the working fluid the aqueous composition of claim 1.
Claim 8
Dependent Claim
28 words
In the operation of a Rankine cycle wherein a working fluid is employed, the improvement which comprises using as the working fluid the aqueous composition of claim 2.
Claim 9
Dependent Claim
28 words
In the operation of a Rankine cycle wherein a working fluid is employed, the improvement which comprises using as the working fluid the aqueous composition of claim 3.
References Cited (Backward Citations)
US4232525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |