US2845440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and intermediates for the preparation of carotenoids
Assignee: F Hoffmann La Roche AG
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Filing: 1956-06-22
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Granted: 1958-07-29
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Expires: 1976-06-22
Abstract
No abstract record available.
Inventors
- 👤 Isler Otto
- 👤 Ruegg Rudolf
- 👤 Zeller Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:29
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/24; C07C403/06; C07C403/10; C07C403/12; C07C403/14; C07C45/00; C07C45/27; C07C45/29; C07C45/292; C07C45/61; C07C45/62; C07C45/64; C07C2601/00; C07C2601/12; C07C2601/14; C07C2601/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
3 words
2,66-TRIMETHYL-4-ETHYLENEDIOXY-2-CYCLOHEXEN-1-ONE 5. 2,6,6-TIMETHYL-4-ETHYLENEDIOXY-1-CYCLOHEXANONE.
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) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |