Patent US4873525A successfully refreshed from Google Patents.
Patent US4957652A successfully refreshed from Google Patents.
US4957652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerants
Assignee: Daikin Industries Ltd
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Filing: 1988-10-18
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Granted: 1990-09-18
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Expires: 2008-10-18
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 15:58
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
39 words
A refrigerant comprising (1) about 10 to about 97% by weight of dichlorotrifuloroethane 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
39 words
A refrigerant comprising (1) about 10 to about 97% by weight of dichlorotrifuloroethane 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
27 words
A refrigerant according to claim 1 which 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 refrigerant according to claim 1 which comprises about 25 to about 97% by weight of dichlorotrifluoroethane and about 75 to about 3% by weight of at least one compound selected from 1,1,1,2-tetrafluoroethane and 1,1,2,2,-tetrafluoroethane.
Claim 5
Dependent Claim
27 words
A refrigerant according to claim 1 which 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
27 words
A refrigerant according to claim 2 which 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
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-17 | 1994-03-19 | 1994-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-17 | 1998-03-19 | 1998-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-17 | 2002-03-19 | 2002-09-18 | $7700.00 | Window Closed / Lapsed |