US3015680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of carotene compounds
Assignee: F Hoffmann La Roche AG
•
Filing: 1956-06-21
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Granted: 1962-01-02
•
Expires: 1976-06-21
Abstract
No abstract record available.
Inventors
- 👤 Isler Otto
- 👤 Ruegg Rudolf
- 👤 Zeller Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:42
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/24; C07C1/00; C07C1/32; C07C1/34; C07C11/00; C07C11/21; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/535; C07F9/5352; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/932; Y10S585/935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
49 A PROCESS FOR THE PRODUCTION OF BETA-CAROTENE WHICH COMPRISES CONDENSING BETA-CYLOGERANYL BROMIDE WITH TRIPHENYLPHOSPHINE, THEREBY PRODUCING BETA-CYCLOGERANYLTRIPHENYPHOSPHONIUM, BROMIDE, REACTING THE LATTER WITH PHENYL-LITHIUM TO PRODUCE TRIPHENYL-(2,6,6-TROMETHYL-1-CYCLOHEXEN-1-YL)-METHYLIDENE PHOSPHINE; AND CONDENSING THE LATTER WITH 2,6,11,15-TETRAMETHYHEXADECAHEPTAENE-(2,4,6, 8,10,12,14,)-DIAL-(1,16) AND REMOVING THE TRIPHENYL PHOSPHINE OXIDE FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
45 words
49 A PROCESS FOR THE PRODUCTION OF BETA-CAROTENE WHICH COMPRISES CONDENSING BETA-CYLOGERANYL BROMIDE WITH TRIPHENYLPHOSPHINE, THEREBY PRODUCING BETA-CYCLOGERANYLTRIPHENYPHOSPHONIUM, BROMIDE, REACTING THE LATTER WITH PHENYL-LITHIUM TO PRODUCE TRIPHENYL-(2,6,6-TROMETHYL-1-CYCLOHEXEN-1-YL)-METHYLIDENE PHOSPHINE; AND CONDENSING THE LATTER WITH 2,6,11,15-TETRAMETHYHEXADECAHEPTAENE-(2,4,6, 8,10,12,14,)-DIAL-(1,16) AND REMOVING THE TRIPHENYL PHOSPHINE OXIDE FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
US2437797A
Cited
US2671112A
Cited
US2609396A
Cited
US2584112A
Cited
US2687437A
Cited
US2745877A
Cited
US2775626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |