Patent US3879474A successfully refreshed from Google Patents.
US3879474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhalant analgesic and anesthetic composition
Assignee: Anaquest Inc
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Filing: 1973-10-09
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Granted: 1975-04-22
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Expires: 1993-10-09
Abstract
Abstract The present invention relates to the novel compound difluoromethyl dichlorofluoromethyl ether (CHF2OCFCl2). The compound is prepared through selective chlorination of difluoromethyl monofluoromethyl ether. The compound is useful as an anesthetic and as a solvent and dispersant for fluorinated materials. The compound has the unusual property of causing a strong analgesic effect on mammals at light anesthetic concentrations.
Inventors
- 👤 Louise S Croix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:55
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/12; C07C43/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
THE COMPOUND DIFLUOROMETHL DICHLOROFLUOROMETHYL ETHER REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
9 words
THE COMPOUND DIFLUOROMETHL DICHLOROFLUOROMETHYL ETHER REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
US2066905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |