US4783276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant and a machine having a refrigerating circuit with refrigerant
Assignee: Akzo NV
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Filing: 1987-12-30
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Granted: 1988-11-08
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Expires: 2007-12-30
Abstract
Abstract The invention pertains to a refrigerant containing dichlorodifluoromethane and dimethyl ether in an amount of 12-35 per cent by weight. A machine having a refrigerating circuit with such refrigerant is also claimed.
Inventors
- 👤 Leonardus J. M. Bohnenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:21
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K2205/00; C09K2205/10; C09K2205/11
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
25 words
A refrigerant containing dichlorodifluoromethane and dimethyl ether, characterized in that the amount of dimethyl ether in the refrigerant is 12 to 35 percent by weight.
Claim 2
Dependent Claim
25 words
A refrigerant containing dichlorodifluoromethane and dimethyl ether, characterized in that the amount of dimethyl ether in the refrigerant is 12 to 35 percent by weight.
Claim 3
Dependent Claim
21 words
A refrigerant according to claim 1, characterized in that the amount of dimethyl ether is 12 to 16 percent by weight.
Claim 4
Dependent Claim
21 words
A refrigerant according to claim 2, characterized in that the amount of dimethyl ether is 12 to 14 percent by weight.
Claim 5
Dependent Claim
20 words
A machine having a refrigerating circuit with refrigerant, characterized in that the refrigerant has a composition according to claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-08 | 1992-05-09 | 1992-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-08 | 1996-05-09 | 1996-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-08 | 2000-05-09 | 2000-11-08 | $7700.00 | Window Closed / Lapsed |