US2792406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing alpha-lipoic acid using dichlorooctanoate and metal disulfide
Assignee: EIDP Inc
•
Filing: 1954-06-01
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Granted: 1957-05-14
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Expires: 1974-06-01
Abstract
No abstract record available.
Inventors
- 👤 Donald S Acker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:18
CPC Classifications
C; C07; C07D; C07D339/00; C07D339/02; C07D339/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
IN A PROCESS FOR THE PREPARATION OF ALPHA LIPOIC ACID, THE STEP WHEREIN A LOWER ALKYL 8-CHLORO-6-KETOOCTANOATE IS REDUCED BY MEANS OF AN ALKALI METAL BOROHYDRIDE TO THE CORRESPONDING LOWER ALKYL 8-CHLORO-6-HYDROXYOCTANOATE.
References Cited (Backward Citations)
US2530348A
Cited
US2655521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |