US4057973A
Expired / Lapsed
US
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Constant boiling mixtures of 1-chloro-2,2,2-trifluoroethane and 2-chloroheptafluoropropane
Assignee: Honeywell International Inc
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Filing: 1976-12-21
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Granted: 1977-11-15
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Expires: 1996-12-21
Abstract
Abstract Constant boiling mixtures of 1-chloro-2,2,2-trifluoroethane and 2-chloroheptafluoropropane are useful as refrigerants, heat transfer media, gaseous dielectrics, expansion agents, aerosol propellants, working fluids in a power cycle and solvents.
Inventors
- 👤 Kevin P. Murphy
- 👤 Richard F. Stahl
- 👤 Sabatino R. Orfeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:07
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C07; C07C; C07C19/00; C07C19/08; C07C19/10; C09K3/00; C09K3/30; C09K5/045; C09K2205/00; C09K2205/10; C09K2205/12; C09K2205/122; C09K2205/128; C09K2205/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
19 words
Constant boiling mixtures consisting essentially of about 29 mole % of 1-chloro-2,2,2-trifluoroethane and about 71 mole % of 2-chloroheptafluoropropane.
Claim 2
Dependent Claim
19 words
Constant boiling mixtures consisting essentially of about 29 mole % of 1-chloro-2,2,2-trifluoroethane and about 71 mole % of 2-chloroheptafluoropropane.
Claim 3
Dependent Claim
16 words
Constant boiling mixtures according to claim 1 which boil at about -5° C. at 760 mm.
Claim 4
Dependent Claim
31 words
The process of producing refrigeration which comprises condensing a constant boiling mixture as described in claim 1 and thereafter evaporating said mixture in the vicinity of a body to be cooled.
Claim 5
Dependent Claim
24 words
The process of producing refrigeration according to claim 3 in which the constant boiling mixture condensed and evaporated is as defined in claim 2.
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) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |