US5254279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonhazardous and environmentally nondestructive refrigerant composition
Assignee: Sanyo Electric Co Ltd
•
Filing: 1992-03-30
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Granted: 1993-10-19
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Expires: 2012-03-30
Abstract
Abstract A refrigerant composition consisting essentially of chlorodifluoromethane, 1-chloro-1, 1-difluoroethane and octafluoropropane, said composition, while preventing the bad influence on ozone layer and maintaining the environment of working place in a nonhazardous condition, can be used as a substitute for R500 or R502 owing to the obtainability of the desired refrigerating capacity and a good return of oil.
Inventors
- 👤 Kazuo Takemasa
- 👤 Yutaka Ohmori
- 👤 Jiro Yuzawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:41
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; C09K2205/128; C09K2205/40; C09K2205/45; C09K2205/47
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
A ternary refrigerant composition consisting essentially of from 75 to 99 wt % of chlorodifluoromethane and 1-chloro-1,1-difluoroethane and from 1 to 25 wt % of octafluoropropane, wherein the proportion of said chlorodifluoromethane ranges from 2.8 parts by weight per part by weight of said 1-chloro-1,1-difluoroethane to 14 parts by weight per part by weight of said 1-chloro-1,1-difluoroethane.
Claim 2
Dependent Claim
57 words
A ternary refrigerant composition consisting essentially of from 75 to 99 wt % of chlorodifluoromethane and 1-chloro-1,1-difluoroethane and from 1 to 25 wt % of octafluoropropane, wherein the proportion of said chlorodifluoromethane ranges from 2.8 parts by weight per part by weight of said 1-chloro-1,1-difluoroethane to 14 parts by weight per part by weight of said 1-chloro-1,1-difluoroethane.
Claim 3
Dependent Claim
22 words
The ternary refrigerant composition of claim 1, consisting of 70 wt % chlorodifluoromethane, 25 wt % 1-chloro-1,1-difluoroethane, and 5 wt % octafluoropropane.
Claim 4
Dependent Claim
22 words
The ternary refrigerant composition of claim 1, consisting of 70 wt % chlorodifluoromethane, 5 wt % 1-chloro-1,1-difluoroethane, and 25 wt % octafluoropropane.
References Cited (Backward Citations)
DE271121C
Cited
JPS63105088A
Cited
US4810403A
Cited
US4971712A
Cited
EP0419042B1
Cited
US5053155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-10-18 | 1997-04-19 | 1997-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-18 | 2001-04-19 | 2001-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-18 | 2005-04-19 | 2005-10-19 | $7700.00 | Window Closed / Lapsed |