Patent US2870197A successfully refreshed from Google Patents.
US2870197A
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US
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4, 4'-disubstituted-c40-carotenoids and their preparation
Assignee: F Hoffmann La Roche AG
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Filing: 1955-12-15
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Granted: 1959-01-20
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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
2026-10-30 02:09
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/24; C07C403/06; C07C403/08; C07C403/10; C07C403/14; C07B; C07B2200/00; C07B2200/07; C07B2200/09; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
ALL-TRANS-4,4''-DI-R-B-CAROTENE, WHEREIN R REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROXY AND LOWER ALKANOYLOXY.
Claim 2
Dependent Claim
16 words
ALL-TRANS-4,4''-DI-R-B-CAROTENE, WHEREIN R REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROXY AND LOWER ALKANOYLOXY.
References Cited (Backward Citations)
US2671112A
Cited
US2680755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |