US2871267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
beta-carotene derivatives and method of preparing derivatives of polyenes
Assignee: California Institute Research Foundation
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Filing: 1956-06-28
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Granted: 1959-01-27
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Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 Francis J Petracek
- 👤 Laszlo K Zechmeister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:27
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/35; A23; A23L; A23L5/00; A23L5/40; A23L5/42; A23L5/47; A61K8/34; A61Q; A61Q1/00; A61Q1/02; C; C07; C07C; C07C403/00; C07C403/24; A61K2800/00; A61K2800/40; A61K2800/42; A61K2800/43
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
37 words
A PROCESS FOR PREPARING DERIVATIVES OF COMPOUNDS HAVING A B-IONYLIDENE STRUCTURE COMPRISING: REACTING ONE OF SAID COMPOUNDS WITH A N-BROMO COMPOUND SELECTED FROM THE CLASS CONSISTING OF N-BROMOAMIDES AND NBROMOIMIDES IN THE PRESENCE OF CHLOROFORM AND ALCOHOL.
Claim 2
Dependent Claim
37 words
A PROCESS FOR PREPARING DERIVATIVES OF COMPOUNDS HAVING A B-IONYLIDENE STRUCTURE COMPRISING: REACTING ONE OF SAID COMPOUNDS WITH A N-BROMO COMPOUND SELECTED FROM THE CLASS CONSISTING OF N-BROMOAMIDES AND NBROMOIMIDES IN THE PRESENCE OF CHLOROFORM AND ALCOHOL.
Claim 3
Dependent Claim
44 words
A PROCESS FOR PREPARING DERIVATIVES OF COMPOUNDS HAVING A B-IONYLIDENE STRUCTURE, THE STEPS COMPRISING: REACTING ONE OF SAID COMPOUNDS WITH N-BROMOSUCCINIMIDE IN A CHLOROFORM-ALCOHOL MIXTURE TO FORM BROMO AND KETAL INTERMEDIATES; AND REACTING SAID INTERMIDIATES WITH AN ORGANIC BASE OF THE SUBSTITUTED AMMONIA TYPE.
Claim 4
Dependent Claim
44 words
A PROCESS FOR PREPARING DERIVATIVES OF COMPOUNDS HAVING A B-IONYLIDENE STRUCTURE, THE STEPS COMPRISING: REACTING ONE OF SAID COMPOUNDS WITH N-BROMOSUCCINIMIDE IN A CHLOROFORM-ALCOHOL MIXTURE TO FORM BROMO AND KETAL INTERMEDIATES; AND REACTING SAID INTERMIDIATES WITH AN ORGANIC BASE OF THE SUBSTITUTED AMMONIA TYPE.
Claim 5
Dependent Claim
14 words
A DERIVATIVE OF B-CAROTENE SELECTED FROM THE CLASS CONSISTING OF: 4-KETO-3'',4''-DEHYDRO-B-CAROTENE; 4-HYDROXY3''-4''-DEHYDRO-B-CAROTENE; AND 4-KETO-4''-HYDROXY-B-CAROTENE.
Claim 6
Dependent Claim
14 words
A DERIVATIVE OF B-CAROTENE SELECTED FROM THE CLASS CONSISTING OF: 4-KETO-3'',4''-DEHYDRO-B-CAROTENE; 4-HYDROXY3''-4''-DEHYDRO-B-CAROTENE; AND 4-KETO-4''-HYDROXY-B-CAROTENE.
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) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |