Patent US4208338A successfully refreshed from Google Patents.
US4208338A
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US
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Cyano dihydro furanones
Assignee: Givaudan Roure Corp
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Filing: 1979-04-23
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Granted: 1980-06-17
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Expires: 1999-04-23
Abstract
Abstract This deals with a process for making furanones having the formula: ##STR1## wherein R represents a hydrogen atom or the methyl or ethyl group. These furanones are known flavoring substances. The furanones I are made by cleaving cyanohydrin from the following novel compounds: ##STR2## The novel compounds II are made by oxidizing the novel compounds: ##STR3##
Inventors
- 👤 Ulrich Huber
- 👤 Hans J. Wild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:13
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; A; A23; A23L; A23L27/00; A23L27/20; A23L27/205; A23L27/2052; C07D307/34; C07D307/56; C07D307/60
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
18 words
Compounds of the general formula ##STR8## wherein R represents a hydrogen atom or the methyl or ethyl group.
Claim 2
Dependent Claim
18 words
Compounds of the general formula ##STR8## wherein R represents a hydrogen atom or the methyl or ethyl group.
Claim 3
Dependent Claim
11 words
A compound in accordance with claim 1, having the formula: 2,5-dimethyl-4-cyano-4-hydroxy-tetrahydrofuran-3-one.
Claim 4
Dependent Claim
11 words
A compound in accordance with claim 1, having the formula: 4-cyano-4-hydroxy-5-methyl-tetrahydrofuran-3-one.
Claim 5
Dependent Claim
11 words
A compound in accordance with claim 1, having the formula: 2-ethyl-4-cyano-4-hydroxy-5-methyl-tetrahydrofuran-3-one.
Claim 6
Dependent Claim
11 words
A compound in accordance with claim 1, having the formula: 4-cyano-4-hydroxy-2-methyl-tetrahydrofuran-3-one.
Claim 7
Dependent Claim
11 words
A compound in accordance with claim 1, having the formula: 5-ethyl-4-cyano-4-hydroxy-2-methyl-tetrahydrofuran-3-one.
Claim 8
Dependent Claim
11 words
A compound in accordance with claim 1, having the formula: 2,5-diethyl-4-cyano-4-hydroxy-tetrahydrofuran-3-one.
Claim 9
Dependent Claim
11 words
A compound in accordance with claim 1, having the formula: 2-ethyl-4-cyano-4-hydroxy-tetrahydrofuran-3-one.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |