US2849507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of all-trans-carotenoid compounds
Assignee: F Hoffmann La Roche AG
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Filing: 1955-12-15
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Granted: 1958-08-26
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Expires: 1975-12-15
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
2026-11-06 12:01
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/24; A; A23; A23L; A23L5/00; A23L5/40; A23L5/42; A23L5/43; A23L5/44; C07C45/00; C07C45/27; C07C45/29; C07C45/298; C07C45/51; C07C45/511; C07C45/515; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/535; C07F9/5352; C07F9/54; C07F9/5442
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A PROCESS FOR THE PREPARATION OF AN ALL-TRANS-CAROTENOID COMPOUND WHICH COMPRISES HEATING A MIXTURE OF A 15,15''-MONO-CIS-C40-CAROTENOID COMPOUND AND AN INERT HYDROCARBON LIQUID, WHEREIN INITIALLY AT LEAST A MAJOR PROPORTION OF THE SAID MONO-CIS-CAROTENOID COMPOUND IS IN SUSPENSION IN SAID HYDROCARBON LIQUID.
Claim 2
Dependent Claim
42 words
A PROCESS FOR THE PREPARATION OF AN ALL-TRANS-CAROTENOID COMPOUND WHICH COMPRISES HEATING A MIXTURE OF A 15,15''-MONO-CIS-C40-CAROTENOID COMPOUND AND AN INERT HYDROCARBON LIQUID, WHEREIN INITIALLY AT LEAST A MAJOR PROPORTION OF THE SAID MONO-CIS-CAROTENOID COMPOUND IS IN SUSPENSION IN SAID HYDROCARBON LIQUID.
References Cited (Backward Citations)
US2671112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |