US4923626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerants
Assignee: Daikin Industries Ltd
•
Filing: 1988-10-28
•
Granted: 1990-05-08
•
Expires: 2008-10-28
Abstract
Abstract A refrigerant comprising chloro-difluoromethane and 1,1,1-trifluoroethane.
Inventors
- 👤 Kohji Tamura
- 👤 Hiroshi Kashiwagi
- 👤 Masahiro Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:56
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
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
21 words
A refrigerant comprising about 40 to about 95% by weight of chlorodifluoromethane and about 60 to about 5% by weight 1,1,1-trifluoroethane.
Claim 2
Dependent Claim
21 words
A refrigerant comprising about 40 to about 95% by weight of chlorodifluoromethane and about 60 to about 5% by weight 1,1,1-trifluoroethane.
Claim 3
Dependent Claim
26 words
A refrigerant according to claim 1 which comprises about 80 to about 95% by weight of chlorodifluoromethane and about 20 to about 5% by weight 1,1,1-trifluoroethane.
References Cited (Backward Citations)
JPS63105088A
Cited
JPS63105089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |