US3989757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerizing cis-carotenoids to all-trans-carotenoids
Assignee: Hoffmann La Roche Inc
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Filing: 1974-04-29
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Granted: 1976-11-02
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Expires: 1994-04-29
Abstract
Abstract Cis-isomers of a carotenoid are isomerized to an all-trans-isomer of the carotenoid by heating the cis-isomers in water at above about 50° C.
Inventors
- 👤 Joseph Donald Surmatis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:17
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
34 words
A process for converting a cis-isomer of a solid carotenoid to an all-trans-isomer of the carotenoid, comprising: immersing the cis-isomer in water and heating to a temperature of from about 50°C. to about 120°C.
Claim 2
Dependent Claim
34 words
A process for converting a cis-isomer of a solid carotenoid to an all-trans-isomer of the carotenoid, comprising: immersing the cis-isomer in water and heating to a temperature of from about 50°C. to about 120°C.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein said carotenoid is a carotenoid hydrocarbon or a carotenoid containing one or more carbonyl groups.
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein said cis-isomer is heated to a temperature of about 70°C. to about 100°C.
Claim 5
Dependent Claim
16 words
The process of claim 3 wherein said cis-isomer is heated to a temperature of about 100°C.
Claim 6
Dependent Claim
14 words
The process of claim 1 wherein said carotenoid contains one or more carbonyl groups.
Claim 7
Dependent Claim
10 words
The process of claim 1 wherein said carotenoid is β-apo-8'-carotenal.
Claim 8
Dependent Claim
11 words
The process of claim 1 wherein said carotenoid is a hydrocarbon.
Claim 9
Dependent Claim
10 words
The process of claim 7 wherein said carotenoid is β-carotene.
References Cited (Backward Citations)
US3441623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |