Patent US1884036A successfully refreshed from Google Patents.
Patent US5087381A successfully refreshed from Google Patents.
US5087381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerants
Assignee: Daikin Industries Ltd
•
Filing: 1990-02-15
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Granted: 1992-02-11
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Expires: 2010-02-15
Abstract
Abstract A refrigerant comprising (1) dichlorotrifluoroethane and (2) at least one compound selected from the group consisting of chlorotetrafluoroethane, pentafluoroethane, tetrafluoroethane, 1-chloro-1,1-difluoroethane, 1,1,1-trifluoroethane and 1,1-difluoroethane.
Inventors
- 👤 Kohji Tamura
- 👤 Hiroshi Kashiwagi
- 👤 Masahiro Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:55
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; C09K2205/40; C09K2205/41
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
58 words
In the development of heating or cooling conditions in a vapor-compression cycle using a liquid refrigerant, the improvement wherein the refrigerant comprises (1) about 10 to about 97% by weight of dichlorotrifluoroethane and (2) about 90 to about 3% by weight of at least one compound selected from the group consisting of 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, 1-chloro-1,1-difluoroethane, 1,1,1-trifluoroethane and 1,1-difluoroethane.
Claim 2
Dependent Claim
58 words
In the development of heating or cooling conditions in a vapor-compression cycle using a liquid refrigerant, the improvement wherein the refrigerant comprises (1) about 10 to about 97% by weight of dichlorotrifluoroethane and (2) about 90 to about 3% by weight of at least one compound selected from the group consisting of 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, 1-chloro-1,1-difluoroethane, 1,1,1-trifluoroethane and 1,1-difluoroethane.
Claim 3
Dependent Claim
29 words
A process according to claim 1 wherein the refrigerant comprises about 40 to about 90% by weight of dichlorotrifluoroethane and about 60 to about 10% by weight of 1-chloro-1,1-difluoroethane.
Claim 4
Dependent Claim
35 words
A process according to claim 1 wherein the refrigerant comprises about 25 to about 97% by weight of dichlorotrifluoroethane and about 75 to about 3% by weight of at least one of 1,1,1,2-tetrafluoroethane and 1,1,2,2-tetrafluoroethane.
Claim 5
Dependent Claim
29 words
A process according to claim 1 wherein the refrigerant comprises about 30 to about 97% by weight of dichlorotrifluoroethane and about 70 to about 3% by weight of 1,1,1-trifluoroethane.
Claim 6
Dependent Claim
29 words
A process according to claim 1 wherein the refrigerant comprises about 40 to about 97% by weight of dichlorotrifluoroethane and about 60 to about 3% by weight of 1,1-difluoroethane.
References Cited (Backward Citations)
US4766260A
Cited
US4957652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |