Patent US3670031A successfully refreshed from Google Patents.
US3670031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzohydroquinones
Assignee: F Hoffmann La Roche AG
•
Filing: 1970-03-19
•
Granted: 1972-06-13
•
Expires: 1990-03-19
Abstract
Abstract This invention relates to 2,3-dimethoxy-5-methyl-6-geranylgeranyl-1,4-benzohydroquinones which is an intermediate in the preparation of the corresponding chromanols. This benzohydroquinone and its corresponding chromanols are useful as antioxidants for foodstuffs, feedstuffs, vitamin preparations and the like.
Inventors
- 👤 Urs Gloor
- 👤 Rudolf Ruegg
- 👤 Ulrich Schwieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:26
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/70; C07D311/72; A; A23; A23B; A23B2/00; A23B2/70; A23B2/725; A23B2/729; A23B2/742; A23B2/75; A23B7/00; A23B7/14; A23B7/153; A23B7/154; A23K; A23K20/00; A23K20/10; A23K20/111; A61; A61K; A61K31/00; A61K31/185; A61K31/19; C07C; C07C323/00; C07C46/00; C07C46/02; C07C46/06; C07C46/10; C07C50/00; C07C50/26; C07C50/28; C09; C09K; C09K15/00; C09K15/04; C09K15/06; C11; C11B; C11B5/00; C11B5/0021; C11B5/0035
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |