US2898385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 15,15'-dehydro-beta-carotene
Assignee: F Hoffmann La Roche AG
•
Filing: 1955-12-09
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Granted: 1959-08-04
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Expires: 1975-12-09
Abstract
No abstract record available.
Inventors
- 👤 Isler Otto
- 👤 Lindlar Herbert
- 👤 Montavon Marc
- 👤 Ruegg Rudolf
- 👤 Zeller Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:38
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/24; C07C403/06; C07C403/10; C07C403/14; C07C45/00; C07C45/51; C07C45/511; C07C45/513; C07C2601/00; C07C2601/12; C07C2601/14; C07C2601/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS FOR THE PREPARTION OF 15,15''-DEHYDRO-BCAROTENE WHICH COMPRISES SUBJECTING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1,18-DI-(2,6,6-TRIMETHYL-1CYCLOHEXEN-1-YL)-3,7,12,16 - TETRAMETHYL - 2,4,6,12,14,16OCTADECAHEXAEN-9-YNE-8,11-DIOL AND LOWER ALKANOIC ACID DIESTERS THEREOF AND 1,18-DI-(2,6,6-TRIMETHYL-1-CYCLOHEXYLIDENE)-3,17,12,16-TETRAMETHYL -2,4,6,12,14,16 - OCTADECAHEXAEN-9-YNE-8,11-DIOL AND LOWER ALKANOIC ACID DIESTERS THEREOF TO ALLYL REARRANGEMENT-DEHYDRATION BY THE ACTION OF A HYDROHALIC ACID.
Claim 2
Dependent Claim
50 words
A PROCESS FOR THE PREPARTION OF 15,15''-DEHYDRO-BCAROTENE WHICH COMPRISES SUBJECTING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1,18-DI-(2,6,6-TRIMETHYL-1CYCLOHEXEN-1-YL)-3,7,12,16 - TETRAMETHYL - 2,4,6,12,14,16OCTADECAHEXAEN-9-YNE-8,11-DIOL AND LOWER ALKANOIC ACID DIESTERS THEREOF AND 1,18-DI-(2,6,6-TRIMETHYL-1-CYCLOHEXYLIDENE)-3,17,12,16-TETRAMETHYL -2,4,6,12,14,16 - OCTADECAHEXAEN-9-YNE-8,11-DIOL AND LOWER ALKANOIC ACID DIESTERS THEREOF TO ALLYL REARRANGEMENT-DEHYDRATION BY THE ACTION OF A HYDROHALIC ACID.
References Cited (Backward Citations)
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US2564534A
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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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |