US3558712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the synthesis of zeaxanthins,xanthophylis,and 3-oxo-beta carotene
Assignee: F Hoffmann La Roche AG
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Filing: 1967-02-23
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Granted: 1971-01-26
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Expires: 1987-02-23
Abstract
Abstract METHOD BY WHICH ZEAXANTHINS, XANTHOPHYLLS AND 3-OXOBETA CAROTENE CAN BE SYNTHESIZED FROM THE CONDENSATION PRODUCT OF MESITYL OXIDE AND ACETO-ACETIC ESTER AS WELL AS NEW AND NOVEL INTERMEDIATES PRODUCED IN THE SYNTHESIS. ZEAXANTHIN AND XANTHOPYLL ARE KNOWN COLORING AGENTS FOR FOODSTUFFS, INCLUDING BEVERAGES, PHARMACEUTICAL AND COSMETIC PREPARATIONS. FURTHERMORE, THROUGH THE USE OF THE CONDENSATION PRODUCT OF MESITYL OXIDE AND ACETO-ACETIC ACID, NEW COMPOUNDS FOR COLORING FOODSTUFFS, INCLUDING BEVERAGES, PHARMACEUTICAL AND COSMETIC PREPARATIONS ARE PRODUCED.
Inventors
- 👤 Joseph Donald Surmatis
- 👤 Armin Walser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:40
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/72; C07C; C07C403/00; C07C403/06; C07C403/08; C07C403/14; C07C403/16; C07C403/20; C07C403/24; C07C45/00; C07C45/27; C07C45/29; C07C45/298; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |