US4879395A
Expired / Lapsed
US
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Vitamin E intermediate
Assignee: Hoffmann La Roche Inc
•
Filing: 1988-09-09
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Granted: 1989-11-07
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Expires: 2008-09-09
Abstract
Abstract A process for producing natural vitamin E and intermediates in this process.
Inventors
- 👤 David L. Coffen
- 👤 Rudolf Schmid
- 👤 Mark J. Sebastian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:17
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/70; C07D311/72; C07C; C07C33/00; C07C33/02; C07C33/025; C07C45/00; C07C45/61; C07C45/62; C07C45/67; C07C45/68; C07C45/72; C07C45/74; C07C47/00; C07C47/02; C07C49/00; C07C49/20; C07C49/203; C07C67/00; C07C67/08; C07C68/00; C07C68/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
38 words
A compound of the formula: ##STR24## wherein the dotted bond forms a double bond or is hydrogenated to form a single bond; and R 3 taken together with its attached oxygen atom forms an ether hydroxy protecting group.
Claim 2
Dependent Claim
38 words
A compound of the formula: ##STR24## wherein the dotted bond forms a double bond or is hydrogenated to form a single bond; and R 3 taken together with its attached oxygen atom forms an ether hydroxy protecting group.
Claim 3
Dependent Claim
18 words
The compound of claim 1 wherein the methyl substituents represented by the wavey line have an alpha orientation.
References Cited (Backward Citations)
US4138289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |