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US3904655A
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Process for the preparation of a flavor substance by reacting a 4-oxy-5-alkyl-3-furanone with a hydrogen sulfide liberating substance
Assignee: Lever Brothers Co
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Filing: 1971-12-13
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Granted: 1975-09-09
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Expires: 1991-12-13
Abstract
Abstract A food flavour substance is prepared by reacting an heterocyclic ketone such as a furanone or a pyrone in the presence of water with hydrogen sulphide or a substance which is capable of giving rise to hydrogen sulphide.
Inventors
- 👤 Den Ouweland Godefridus An Van
- 👤 Henricus Gerardus Peer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:35
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/60; A; A23; A23L; A23L27/00; A23L27/20; C07D309/00; C07D309/34; C07D309/36; C07D309/38
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
22 words
A PROCESS FOR THE PREPARATION OF A FLAVOR SUBSTAN COMPRISING REACTING AT A TEMPERATURE OF 0*-150*C A HETEROCYCLIC KETONE HAVING THE STRUCTURE:
Claim 2
Dependent Claim
22 words
A PROCESS FOR THE PREPARATION OF A FLAVOR SUBSTAN COMPRISING REACTING AT A TEMPERATURE OF 0*-150*C A HETEROCYCLIC KETONE HAVING THE STRUCTURE:
Claim 3
Dependent Claim
25 words
A process according to claim 1, in which the ketone is selected from the group consisting of: 4-hydroxy-5-methyl-2,3-dihydrofuran-3-one 4-hydroxy-2,5-dimethyl-2,3-dihydrofuran-3-one 4-hydroxy-2-methyl-5-ethyl-2,3-dihydrofuran-3-one 4-hydroxy-5-methyl-2-ethyl-2,3-dihydrofuran-3-one 4-hydroxy-2,5-diethyl-2,3-dihydrofuran-3-one 4-hydroxy-2-hydroxymethyl-5-methyl-2,3-dihydrofuran-3-one 4-acetoxy-5-methyl-2,3-dihydrofuran-3-one 4-methoxy-2,5-dimethyl-2,3-dihydrofuran-3-one.
Claim 4
Dependent Claim
22 words
A process according to claim 1, in which the sulphur-containing compound is selected from the group consisting of cysteine, mercaptoacetamide and thioacetamide.
Claim 5
Dependent Claim
29 words
A process according to claim 1, in which the sulphur-containing compound is selected from the group consisting of sulphides and hydrosulphides of alkali metals, alkaline earth metals and ammonia.
References Cited (Backward Citations)
US3651097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |