US4149018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound CHCl2 -O-CHF-CHF2
Assignee: Imperial Chemical Industries Ltd
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Filing: 1978-02-06
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Granted: 1979-04-10
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Expires: 1998-02-06
Abstract
Abstract A process for the manufacture of the anaesthetic compound CHF2-O-CHF-CHF2 which comprises the reduction of a mono, di- or tri-chlorinated or brominated derivative of the above compound, or the replacement by fluorine of one or more hydrogen, chlorine or bromine atoms in a less-fluorinated derivative of the above compound.
Inventors
- 👤 William Bell
- 👤 Keith Pearson
- 👤 Richard W. Rendell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:12
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
7 words
The compound CHCl 2 --O--CHF--CHF 2 .
Claim 2
Dependent Claim
7 words
The compound CHCl 2 --O--CHF--CHF 2 .
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) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |