US5035823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant compositions of 1,11-trifluoroethane
Assignee: Daikin Industries Ltd
•
Filing: 1988-09-21
•
Granted: 1991-07-30
•
Expires: 2008-09-21
Abstract
Abstract The present invention provides a refrigerant comprising 1,1,1-trifluoroethane and either chlorotetrafluoroethane or tetrafluoroethane.
Inventors
- 👤 Koji Tamura
- 👤 Hiroshi Kashiwagi
- 👤 Masahiro Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:52
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C09K2205/00; C09K2205/10; C09K2205/12; C09K2205/122; C09K2205/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
27 words
A working fluid for refrigerator consisting essentially of 90 to 5% by weight of 1,1,1-trifluoroethane and respectively 10 to 95% by weight of either chlorotetrafluoroethane or tetrafluoroethane.
Claim 2
Dependent Claim
27 words
A working fluid for refrigerator consisting essentially of 90 to 5% by weight of 1,1,1-trifluoroethane and respectively 10 to 95% by weight of either chlorotetrafluoroethane or tetrafluoroethane.
Claim 3
Dependent Claim
27 words
A working fluid according to claim 1 which consists essentially of 70 to 5% by weight of 1,1,1-trifluoroethane and respectively 30 to 95% by weight of chlorotetrafluoroethane.
Claim 4
Dependent Claim
27 words
A working fluid according to claim 1 which consists essentially of 40 to 5% by weight of 1,1,1-trifluoroethane and respectively 60 to 95% by weight of tetrafluoroethane.
References Cited (Backward Citations)
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Cited
US4224795A
Cited
US4303536A
Cited
JPS63305185A
Cited
JPS63308084A
Cited
JPS63308085A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |