US3311656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intermediates for the preparation of a carotenoid
Assignee: F Hoffmann La Roche AG
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Filing: 1964-05-12
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Granted: 1967-03-28
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Expires: 1984-05-12
Abstract
No abstract record available.
Inventors
- 👤 Surmatis Joseph Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:07
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/24; C07C403/06; C07C403/08; C07C403/12; C07C403/14; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/54; C07F9/5442; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
8 words
3-ACETOXY VITAMIN A ALCOHOL. 5. 3-ACETOXYRETINYL TRIPHENYLPHOSPHONIUM CHLORIDE.
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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |