US3697295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flavouring substances
Assignee: Lever Brothers Co
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Filing: 1969-06-26
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Granted: 1972-10-10
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Expires: 1989-06-26
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
- 👤 Godefridus Antonius M Ouweland
- 👤 Henricus Gerardus Peer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:50
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/18; A; A23; A23L; A23L27/00; A23L27/20; A23L27/205; A23L27/2052; C07D307/20; C07D307/26; C07D307/30; C07D307/32; C07D307/34; C07D307/56; C07D307/58; C07D307/60; C07D307/64; C07D309/00; C07D309/34; C07D309/36; C07D309/38; C11; C11B; C11B9/00; C11B9/0069; C11B9/0073; C11B9/008; C11B9/0084; Y; Y10; Y10S; Y10S426/00; Y10S426/802
Claims Analysis
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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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |