Patent US3579586A successfully refreshed from Google Patents.
US3579586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of the dextrorotatory 2,2' - (ethylene-di-imino)-di-1-butanol
Assignee: LABORATORIO CHIMICO FARMACEUTICO GIORGIO ZOJA SpA
•
Filing: 1968-11-13
•
Granted: 1971-05-18
•
Expires: 1988-11-13
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF HIGHLY PURE, LEVOSIOMER FREE, (+) 2,2-ETHYLENEDIIMINO-DI-1-BUTANOL DIHYDROCHLORIDE INVOLVING RESOLTUION OF ($) 2-AMINO-1-BUTANOL (+) TARTRATES WITH BOILING METHANOL, REACTION OF (+) 2-AMINO1-BUTANOL WITH ETHYLENE DICHLORIDE AND PRECIPITATING THE INTERMEDIATE PRODUCT WITH GASEOUS HYDROCHLORIC ACID TO OBTAIN THE DESIRED PRODUCT.
Inventors
- 👤 Giorgio Zoja
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:41
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/13; C; C07; C07C; C07C215/00; C07C215/02; C07C215/04; C07C215/06; C07C215/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |